EV8380
Contents
1. nr nr EM 4 3 2 EV8380 Graphical User Interface GUI 6 3 2 1 General Comments sss nete enne 6 3 2 2 Starting the EV8380 GUI aaide dadra 6 3 2 8 EV8380 GUI Buttons and Text Boxes 6 3 2 4 EV8380 GUI Examples Direct Register Operations 7 3 2 5 EV8380 GUI Examples Using Text Script Files with the SEND FILE Utility 7 3 2 6 Creating EV8380 Text Script Files 7 3 3 EV8380 External Connections 10 4 General DICT 11 4 1 Baseband Clock Generation 11 41 15 Using the RF Reference Oscillator as the CMX838 Clock 11 4 1 2 Using External Sources as the CMX838 Clock 11 4 2 Subaudio Processing on re teu Lot le e I te enn 12 421 Power Up Initialization Sequence for CMX838 14 5 Programming Examples pna an PER RE KNEE UR 14 Device2. Bit 7 Bit 6 Bits 5 0 Tone detector index number 1 51 Additionally using index 63 can enable or disable all detectors while issuing just one task Enabling index 62 enables detection of all TIA 603 Tones There is no single command to disable just the TIA 603 Tone Detectors instead use index 63 to disable all detectors 1 enable Don t O disable care NOTE To determine the value to load in the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register the power control and IRQ control bits should be logically OR ed with the desired task field The following example shows how to enable tone detectors 1 7 10 12 18 and 20 only NOTE Multiple calls to Task 4 can also be used to enable or disable multiple detectors but would however require more C BUS transactions and a waiting period of 250us after each task 4 call The use of multiple calls to task 4 would allow the tone decoders to continue to run however To disable all tone detectors and enter quickly enable multiple detectors mode 1 Write 3F to SUBAUDIO TASK DATA 95 register 2 Write 4D to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register 3 Wait 250us to ensure the CMX838 performs Task 13 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit f
3. Essex CM9 6WG England Tel 44 0 1621 875500 Fax 444 0 1621 875600 uk sales cmlmicro com www cmlmicro com D CML D 1 February 2002 CML Microcircuits eu USA Inc COMMUNICATION SEMICONDUCTORS 4800 Bethania Station Road Winston Salem NC 27105 USA Tel 1 336 744 5050 0800 638 5577 Fax 41 336 744 5054 us sales Qcmlmicro com www cmlmicro com CML Microcircuits e Singapore Pte Ltd COMMUNICATION SEMICONDUCTORS No 2 Kallang Pudding Road 09 05 06 Mactech Industrial Building Singapore 349307 Tel 65 7450426 Fax 65 7452917 sg sales Qcmlmicro com www cmlmicro com
4. 14 5 2 Tone Signaling Processor Examples 17 5 2 1 Howto Generate a Standard CTCSS Tone sss eene 17 5 2 2 How to Generate A User Defined TX Subaudio 17 5 2 3 How to Generate an Audio Tone at the AUX I O 17 5 2 4 How to Detect a Standard CTCSS Tone 18 5 2 5 How to Quickly Enable Disable Multiple 5 19 5 2 6 How to Detect a User Defined Subaudio Tone sss 20 5 3 Audio Filtering Examples oett M ELI create eh anh ue 21 5 3 1 How to Generate Melody Tone And Process It with the 838 21 5 3 2 How to Use Pre Emphasis De Emphasis 21 5 4 RF Programming Exatples 5 ee eoe Fb pte e E 22 5 4 1 Howto Change an FRS RF Channel sse nnne ener 22 5 4 2 How to Set the IF Offset For A FRS RX 22 5 5 Modulation Section Programming Example 22 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Betha
5. 2 HS DY WH 3 2 EV8380 Graphical User Interface GUI 3 2 1 General Comments The CMX838 is controlled by writing to reading from its internal registers over its C BUS serial host uC interface Using the EV8380 CMX838 C BUS transactions are entered in a simple Windows graphical user interface the EV8380 GUI The EV8380 GUI assembles C BUS transactions from user input and causes them to be executed between the PC and the CMX838 by way of the PCMCIA card The C BUS transactions required to accomplish various CMX838 functionality can be entered in one of two ways 1 Direct C BUS register read and or write operations 2 Use of tab delimited text files that contain a sequence of script commands with desired register addresses and contents 3 2 2 Starting the EV8380 GUI Both of the above approaches involve the use of the EV8380 graphical user interface GUI In order to access the GUI after the EV8380 software has been installed select Start gt Programs gt MX Com gt EV8380 A dialog box named EV8380 should now appear on the screen To access the GUI the user should click on the Control menu of the EV8380 dialog box and then select the CBUS option The GUI named C BUS Control should now be on the screen 3 2 3 EV8380 GUI Buttons and Text Boxes The buttons and text boxes in the GUI are as follows 1 SEND FILE This button will allow selection of a txt script file in the PC directory where the EV8380 ex
6. Contents Unpacking Please ensure that you have received all of the items on the separate information sheet EK8380 and notify MX COM within 7 working days if the delivery is incomplete 2 General Description The EV8380 is the evaluation platform for the CMX838 MX COM s advanced processor IC for FRS GMRS and PMR446 radio services This innovative device combines much of the audio processing subaudio processing and RF synthesizer components that are required for a complete FRS radio With the addition of a few external components realistic testing of FRS systems utilizing the CMX838 can be performed The EV8380 is shipped from the factory pre configured for operation 1 With a 4 0MHz crystal as the CMX838 s clock source 2 With the CMX838 power supplied from the VDD IN pin P1 2 and AGND P1 3 3 Operation This section provides instructions for users who wish to experiment immediately with the evaluation kit A more complete description of the kit and its operation appears later in this document The EV8380 offers considerable configuration flexibility such as the ability to select different power supplies and timing sources The EV8380 is shipped from the factory for operation at 5 0V with an external 4 0MHz crystal installed While other configurations are possible the following information will allow the user to operate the EV8380 with a minimum of adjustments 3 4 Setting Up 1 Make sure power is not applied to the EV838
7. Control gt CBUS Atthis point the EV8380 graphical user interface GUI should appear on the screen Ensure the following jumpers are configured on the EV8380 as follows a E1 and E2 installed allow the use of external crystal oscillator circuit with CMX838 b E6 and E12 removed prevents PCMCIA interface from supplying power to board c E9 installed allows speaker driver amplifier to receive power from VDD IN Connect a 2 7 5 5V power supply to VDD IN P1 1 and GND P1 3 a Note There is no on board regulator the EV8380 so the power supply should be set to the desired operating voltage Please refer to the CMX838 data bulletin for information on maximum allowed voltage settings Apply power to EV8380 from its 2 7 5 5V power supply Connect one end of the supplied PCMCIA card cable to the PCMCIA card and connect the other end to J1 of the EV8380 a The PCMCIA card and ribbon cable both have white dots on them When connecting the ribbon cable to the PCMCIA card ensure that the cable connector side with the white dot is on the matching side of the PCMCIA card Connect a microphone if desired to the MIC input jack of the EV8380 Connect a speaker if desired to the SPKR output jack of the EV8380 In this configuration the EV8380 user has the ability to have the CMX838 1 2 Generate a standard or non standard CTCSS tone invert the signal if desired amplify it if desired and have it pres
8. E1 and E2 are installed 3 Write a byte to the SYNTHESIZER BASEBAND CLOCK CONTROL 89 register to configure the CMX838 clock generation circuits a For example if the crystal operates at 4 0MHz a byte of 40 will enable baseband clock generation from the 4 0MHz crystal oscillator 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 12 EV8380 User Manual 4 1 2 2 Operating the CMX838 from a System Clock To operate the CMX838 from a system clock signal e g a host microcontroller s clock 1 Please consult the CMX838 data bulletin for appropriate system clock frequency choices 2 Ensure jumpers E1 and E2 are removed 3 Connect the system clock signal to the XTALIN pin of the CMX838 by way the jumper E1 pins a Please consult the CMX838 data bulletin for recommendations on drive level 4 Write a byte to the SYNTHESIZER BASEBAND CLOCK CONTROL 89 register to configure the CMX838 clock generation circuits a For example if the system clock operates at 4 0MHz a byte of 40 will enable baseband clock generation from the 4 0MHz system clock signal 4 2 Subaudio Processing The CMX838 offers tremendous flexibility in the ability to process subaudio tones 1 Single tone generation standard and user
9. LO8ESXWO t o m QU Ni33H NES 865 NIHu 213 oo Svein LovioNod A0d ssas e ws Jniooo 9vO SS S e o 4 2 SSAS ddee SSAS panid ion 479 wizeysow 124 NIOIN 089 oio 8 5 NM ez on i eed Ly QNOV NIXH WN ANA s n 26 0 anov E vo 8 m eH 95 Lewd ar vss wads i 10N ZO3H31SXOVl HNOHd 1 l 2 Ic EV8380 Schemat Figure 4 Doc 20480230 001 All trademarks and service marks are held by their respective companies www mxcom com tel 800 638 5577 336 7445050 fax 336 744 5054 2001 MX COM Inc 4800 Bethania Station Road Winston Salem NC 27105 1201 USA Evaluation Kit for CMX838 Family Radio Processor 25 EV8380 User Manual
10. are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 22 EV8380 User Manual 54 RF Programming Examples 5 4 1 How to Change an FRS RF Channel To change the RF channel for FRS GMRS or PMR446 write a byte to the SYNTHESIZER CHANNEL SELECT 8B register that contains the desired channel number If the device is in Tx mode the new channel carrier frequency will automatically be synthesized by the CMX838 RF synthesizer 542 How to Set the IF Offset For A FRS RX Channel In the instances where it is desired to transmit on one channel but receive on another the SYNTHESIZER 1ST IF OFFSET 8D register allows for a high side or low side IF offset to be programmed into the CMX838 For example suppose the CMX838 based FRS radio is transmitting on FRS channel 14 467 7125MHz but the radio user wishes to receive on FRS channel 1 462 5625MHz To accomplish this synthesizer manipulation a value can be loaded into the SYNTHESIZER 1ST IF OFFSET 8D register that will automatically produce the desired offset when the CMX838 is switched from transmit mode to receive mode For this example the following calculations allow the determination of the appropriate setting for the SYNTHESIZER 1ST IF OFFSET 8D register 1 467 7125MHz 462 5625MHz 5 15MHz Frequency IF shift required between FRS channels 14 amp 1 2 5 15MHz 12 5kHz 412d 019C Number of FRS channels 12 5kHz wide in the requi
11. characters such as or Ox Pause command lt tab gt argument e Argument must be in decimal form without any preceding characters such as 0d Table 1 Script Command Types Comments are also supported by using to indicate the start of a comment Text following in any line is treated as a comment and ignored 3 2 6 2 C BUS Type Commands Valid values for the C BUS type script command fields are described in the following tables Script Description command W1 single byte C BUS write single byte is a C BUS address W2 two byte C BUS write first byte is a C BUS address second byte is an 8 bit C BUS data argument W3 three byte C BUS write first byte is a C BUS address second and third bytes are a 16 bit C BUS data argument R2 single byte C BUS read single byte is the address of the 8 bit C BUS register being read R3 double byte C BUS read single byte is the address of the 16 bit C BUS register being read Table 2 C BUS Type Commands NOTES 1 Both C BUS register address and argument if any must be in hexadecimal form without any preceding characters such as or Ox 2 Each C BUS register supports a single argument size and operation type read or write It is an error to use a script command that does not match a register s size e g using a W1 script command to write to a 2 byte C BUS register 2001 MX COM Inc www mxcom com tel 800
12. defined CTCSS tones 2 Single tone detection standard and user defined CTCSS tones 3 For tone detection the formation of a tone watch list is possible with the list comprised of as many as 50 different standard and non standard CTCSS tones that are effectively detected in parallel 4 Multiple tone detection the CMX838 can be configured to search for all of the standard CTCSS tones and or a user programmed tone 5 Custom tone detection one of the CMX838 parallel CTCSS tone decoders is programmable and allows configuration of an arbitrary tone Flexibility is also offered by way of adjustable filter settings and gain stages in the CMX838 subaudio signal path The CMX838 supports individual enabling disabling of tones to allow users to configure their own tone sets with each enabled tone effectively detected in parallel with all other enabled tones The CMX838 also offers two pre configured sets of CTCSS tones so a full set may be activated in one step One set includes all 39 TIA 603 A tones The second set includes 50 commonly encountered CTCSS tones including all 39 tones specified in the TIA 603 A standard Once activated a pre configured tone set may be edited For example the set may be configured to enable all 39 TIA 603 A tones in one step and subsequently edited to remove or add more tones In general to generate or detect one of these tones the hex value for the tone of interest should be loaded into the SUBAUDIO TAS
13. enabled NOTE This command is not required if the device was already in normal run mode 53 Audio Filtering Examples 5 3 1 How to Generate Melody Tone And Process It with the CMX838 A common feature in FRS type radios is the generation of melody tones for use as call alerts The CMX838 can generate audio tone square wave signals and filter them to make them suitable to drive the RXOUT to an external speaker path and TXMOD1 and TXMOD 2 to external RF transmitter paths output pins as desired The CMX838 eliminates the need for external filtering Simultaneous output to all of RXOUT TXMOD1 and TXMOD2 pins supports playing a melody tone at the local loudspeaker while simultaneously transmitting it via RF For example to configure the CMX838 to generate an audio melody tone and perform signal processing on it a typical C BUS sequence could be 1 Configure other registers as necessary for proper baseband clock generation signal path routing amplification etc 2 Configure the tone signaling processor to generate the audio tone frequency of interest as described in sections 5 2 3 1 Set the Audio Tone Frequency pg 18 and 5 2 3 2 Internally Connect the AUX I O Pin to the Audio Tone Generator pg 18 3 Write DE to SETUP 5F register a Tx disabled this is a don t care b Audio signal input supplied from AUX I O pin c Audio signal passed from HPF output to Limiter LPF input d Bit 0 is unused and must be
14. is available at this point This connection should be connected to the external loop filter input a Pads are available on the EV8380 board for the addition of user selected loop filter components and or an amplifier for the charge pump output signal Jumpers E14 and E15 allow various charge pump amp loop filter configurations 2 SM2 on schematic This connector is the injection point for the synthesizer RF negative input i e VCO output 3 REFIN on schematic The output of the external RF reference oscillator i e VC TCXO should be connected here 6 1 4 Clock Oscillator Flexible clock generation capabilities allow the CMX838 baseband clocks to be derived from the RF reference oscillator a dedicated crystal oscillator circuit or an externally applied signal of suitable frequency and amplitude A 4 0MHz crystal is provided on the EV8380 for baseband clock generation Two jumpers E1 and E2 which are normally fitted enable the on board crystal oscillator For lowest cost more synchronized designs use an RF reference oscillator signal for baseband clock generation instead of an external crystal or external baseband clock signal To do this 1 Connect an external RF reference oscillator to the REFIN SMB connector on the EV8380 board a Please note that the reference oscillator frequencies compatible with the CMX838 are listed in the CMX838 data bulletin 2 Write a data byte to the SYNTHESIZER BA
15. read byte from the SUB AUDIO STATUS register a Type in 94 SUB AUDIO STATUS register hex address in the C BUS ADDRESS box b Click on READ 1 box to read the contents of the desired register 3 2 5 EV8380 GUI Examples Using Text Script Files with the SEND FILE Utility Several tab delimited text files are provided on the EV8380 CD ROM to serve as examples and facilitate testing These text files can be imported with the SEND FILE command to rapidly exercise the CMX838 s feature set without requiring the user to manually initialize and change the necessary register settings Once the user is comfortable with the GUI and general CMX838 operation these text files can be modified or new ones may be created as desired To use the files provided on the EV8380 CD ROM the user should do the following e From within the EV8380 GUI click the SEND FILE button e When the Open dialog box appears click on the tab delimited text file you wish to have loaded to the CMX838 Immediately after this selection a Save As dialog box will appear o After a file has been loaded into the CMX838 the echoed response of the CMX838 will be sent back to the PC The echoed response is saved into a file for later viewing if desired o the desired name of the echoed contents file and click e Atthis point the CMX838 will perform the tasks that were loaded in the tab delimited text file The user can create thei
16. reserves the right to change specifications at any time and without notice 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 4 EV8380 User Manual 1 Preliminary Information 1 4 Laboratory Equipment The following laboratory equipment is needed to use this evaluation kit 1 2 7 5 5VDC Power Supply Note that there is no on board regulator on the EV8380 so the power supply should be set to the desired operating voltage Please refer to the CMX838 data bulletin for information on maximum allowed voltage settings 2 compatible PC 66MHz 486 or better running Microsoft Windows 95 98 2000 The PCMCIA card used by the EV8380 does not provide support for Windows NT 3 An available PCMCIA slot for the PCMCIA interface card 1 2 Handling Precautions Like most evaluation kits this product is designed for use in office and laboratory environments The following practices will help ensure its proper operation 1 2 1 Static Protection This product uses low power CMOS circuits which can be damaged by electrostatic discharge Partially damaged circuits can function erroneously and lead to deceptive results Observe ESD precautions at all times when handling this product 1 2 2
17. set to logic 1 4 Write 50 to AUDIO CONTROL 81 register a First stage of audio filtering configured as LPF b Audio signal routed through HPF c Audio level gain stage between pre emphasis network and HPF set to 0 0dB 5 Write 97 to RX AUDIO LEVEL CONTROL 82 register a Deviation limiter bypassed b Post deviation limiter LPF not bypassed c De emphasis network is not bypassed d Rx Audio Level gain stage downstream of de emphasis network set to 0 0dB 6 Connect speaker to connector J3 of the EV8380 The desired tone should be audible at the speaker 5 3 2 How to Use Pre Emphasis De Emphasis For the transmit path pre emphasis can be realized either through an appropriate combination of external components between the microphone and the CMX838 microphone input pin or by activating the CMX838 internal pre emphasis filter The CMX838 internal pre emphasis filter can be activated by setting bits 7 and 6 of the AUDIO CONTROL register 81 to 0 Please note that if pre emphasis is performed externally the internal pre emphasis filter should not be utilized in the signal flow path De emphasis can be realized by activating the CMX838 internal de emphasis filter this is done by setting bit 5 of the RX VOLUME CONTROL register 82 to 0 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks
18. trademarks and service marks are held by their respective companies CML Microcircuits COMMUNICATION SEMICONDUCTORS CML Product Data In the process of creating a more global image the three standard product semiconductor companies of CML Microsystems Plc Consumer Microcircuits Limited UK MX COM Inc USA and CML Microcircuits Singapore Pte Ltd have undergone name changes and whilst maintaining their separate new names CML Microcircuits UK Ltd CML Microcircuits USA Inc and CML Microcircuits Singapore Pte Ltd now operate under the single title CML Micro circuits These companies are all 100 owned operating companies of the CML Microsystems Plc Group and these changes are purely changes of name and do not change any underlying legal entities and hence will have no effect on any agreements or contacts currently in force CML Microcircuits Product Prefix Codes Until the latter part of 1996 the differentiator between products manufactured and sold from MXCOM Inc and Consumer Microcircuits Limited were denoted by the prefixes MX and FX respectively These products use the same silicon etc and today still carry the same prefixes In the latter part of 1996 both companies adopted the common prefix CMX This notification is relevant product information to which it is attached Company contact information is as below CML Microcircuits UK Ltd COMMUNICATION SEMICONDUCTORS Oval Park Langford Maldon
19. 0 2 Install PCMCIA software from supplied CD ROM e Install EV8380 Software VerX X CD ROM X X will be a version number e g 1 2 Go into Windows Explorer open the CD ROM drive selection and select Disk 1 e Double click the Setup exe file o For Windows 95 98 systems when prompted select yes to allow modifications to the AUTOEXEC BAT and CONFIG SYS files Once the installation of the EV8380 software is complete reboot the computer 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 5 EV8380 User Manual 7 8 e After the PC has restarted install the PCMCIA card without any cable attached into an available slot in the computer e The operating system should automatically detect and configure the PCMCIA After the PCMCIA card installation is complete go to Start gt Programs gt MX Com gt InsCal32 e When prompted click to allow the detected board to be added to the Instacal configuration list This enables the PCMCIA card for access by the provided software e Exit Instacal Goto Start gt Programs gt MX Com gt EV8380 Once the EV8380 dialog box appears the user should select
20. 00 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 6 EV8380 User Manual 9 Configure the TX MOD 1 amp 2 drivers to allow for either single point modulation or two point modulation 10 Configure the TX MOD 1 or 2 drivers or both to invert the phase of the transmitted signal by 180 as desired to compensate for inverting response in either an attached VCO or VC TCXO Activate the external signal processing paths to allow for off chip companding and or scrambling Switch between RF channels for either of the FRS GMRS or PMR446 radio services Setup the CMX838 to transmit on one RF channel and receive on another Program the CMX8368 to transmit on a RF channel other than that used in the FRS GMRS PMR446 radio services i e generic synthesizer programming 15 Connect the EV8380 to external circuits to allow complete radio system testing Tab delimited text files are available in the Examples folder of the EV8380 software installation directory to allow quick operation of the CMX838 Operations such as melody tone generation and tone cloning can be quickly performed by the use of these tab delimited text files Please review Section 3 2 CMX838 Operation for more information on how these text files should be used 11 12 13 14
21. 2 S CMX838D1 3 R15 Q De 5 2 al Figure 5 EV8380 Board Layout 8 Signal List CONNECTOR PINOUT Connector Connector Signal Name Signal Type Description Ref Pin No J1 32 REPLY DATA Output C BUS Reply Data 31 IRQ Output C BUS Interrupt Request 39 SCLK Input C BUS Serial Clock 38 CMDDATA Input C BUS Command Data 37 CS Input C BUS Chip Select 36 CS AUX Input C BUS Chip Select for second EV8380 49 PCMCIA Vin Input ve connector from PCMCIA card 2 DGND Ground Digital ground 50 DGND Ground Digital ground J2 1 MIC INPUT Input Microphone input jack J3 1 SPEAKER Output Speaker output jack J4 2 SCLK Input C BUS Serial Clock for second EV8380 4 CMDDATA Input C BUS Command Data for second EV8380 6 REPLY DATA Output C BUS Reply Data for second EV8380 8 IRQ Output C BUS Interrupt Request for second EV8380 10 CS Input C BUS Chip Select for second EV8380 P1 1 V IN Power ve power 1 from external power supply VDD IN Power ve power 2 from external power supply 2001 MX COM Inc 4800 Bethania Station Road Winston Salem NC 27105 12 www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 01 USA Doc 20480230 001 All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 26
22. 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 9 EV8380 User Manual CMX838 Register Name Register CMX838 Appropriate Address function area C BUS Script Command GENERAL RESET 01 system Wi AUDIO POWER AND BANDWIDTH CONTROL 83 system W2 SYNTHESIZER BASEBAND CLK CONTROL 89 system W2 SETUP REGISTER 80 audio W2 AUDIO CONTROL 81 audio W2 SYNTHESIZER GENERAL CONTROL 8A synthesizer W2 SYNTHESIZER CHANNEL SELECT 8B synthesizer W2 SYNTHESIZER 1ST IF OFFSET 8D synthesizer W3 SYNTHESIZER STATUS 8C synthesizer R2 SUBAUDIO GENERAL CONTROL 93 subaudio W2 SUBAUDIO STATUS 94 subaudio R2 8 BIT SUBAUDIO TASK DATA 95 subaudio W2 16 BIT SUBAUDIO TASK DATA 8E subaudio W3 SUBAUDIO ANALOG LEVEL CONTROL 97 subaudio W3 TX MOD 1 amp 2 CONTROL 88 output W3 RX VOLUME CONTROL 82 output W2 Table 3 CMX838 Registers and Valid C BUS Script Commands 3 2 6 3 Pause Type Commands Pauses are supported to allow the installed CMX838 to dwell in a configured state for an extended period For example the CMX838 may be configured to emit an audio tone and script pause commands may be used to determine the length of the tone before it is turned off One pause command is of a fixed duration The other
23. 838 Family Radio Processor 7 EV8380 User Manual 9 WRITE 3 This button will cause three data bytes stored in C BUS ADDRESS FIRST DATA and SECOND DATA to be written to a CMX838 register i e one address byte and two data bytes 10 READ 1 This button will cause one byte of data to be read out of a CMX838 register 11 READ 2 This button will cause two bytes of data to be read out of a CMX838 register 3 2 4 EV8380 GUI Examples Direct Register Operations As described earlier the EV8380 GUI can be used either with tab delimited text files or with direct register manipulations Here are a few examples of how direct register operations can be performed with the EV8380 GUI 1 To issue a General Reset to the CMX838 a Type in 01 hex address corresponding to General Reset command into C BUS ADDRESS box b Click WRITE 1 box to send the General Reset address to the CMX838 2 To write a byte to the SETUP register a Type in 80 SETUP register hex address in the C BUS ADDRESS box b Type in desired register value in FIRST DATA box c Click WRITE 2 box to send the address and data byte to the CMX838 3 To write two bytes to the Synthesizer 1st IF Offset register a Type in 8D Synthesizer 1st Offset register hex address in the C BUS ADDRESS box b Type first data byte into FIRST DATA box Type second data byte into SECOND DATA box d Click WRITE 3 box to send the address and two data bytes to the CMX838 4 To
24. EV8380 User Manual CONNECTOR PINOUT Connector Connector Signal Name Signal Type Description Ref Pin No 3 GND Ground Analog signal ground 4 V IN Power ve power from external supply not used P2 1 AOUT Output External signal processing path A output 2 AGND Ground Analog signal ground 3 BOUT Output External signal processing path B output 4 AGND Ground Analog signal ground 5 AIN Input External signal processing path A input 6 AGND Ground Analog signal ground Input External signal processing path B input 8 AGND Ground Analog signal ground P3 1 RXOUT Output Processed receive audio output 2 AGND Ground Analog signal ground 3 NC NC No connection 4 NC NC No connection P4 1 TXMOD1 Output Transmit modulation output 1 2 SVSS Ground Analog signal ground 3 TXMOD2 Output Transmit modulation output 2 4 SVSS Ground Analog signal ground P5 1 RXIN Input Receive input for audio amp subaudio signals 2 AGND Ground Analog signal ground 3 AUX Bi directional Auxiliary signal input output 4 AGND Ground Analog signal ground 5 MIC IN Input Auxiliary microphone input 6 AGND Ground Analog signal ground 7 NC NC NC 8 MIC OUT Output Microphone amplifier output SM1 1 CP OUT Output Charge pump output current 2 SVSS Ground SM2 1 RFIN Input Synthesizer RF positive input 2 SVSS Ground SM3 1 REF IN Input Reference oscillator input 2 SVSS Ground Table 5 Connector List Test Point Description Ref TP1 CM
25. K 8 BIT DATA 95 register In typical applications once the tone signaling processor is initialized its primary behavior CTCSS encode and decode is steered by the TX RX bit of the SETUP Register 80 so tone sets do not have to be repeatedly configured 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 13 EV8380 User Manual CTCSS Tone Tone Index hex CTCSS Tone Tone Index hex 3F all tones selected user programming and TIA 603 Table 2 CMX838 Standard CTCSS Tone Table The following information describes important timing aspects of the various operating modes of the tone signaling processor 1 2 CMX838 clocks must be properly set up and running before any tasks can be issued to the tone signaling processor During normal operation tasks can be issued to the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register at a maximum rate of one task every 250us If the tone signaling processor is in its Fast Initialization mode tasks can be issued to the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register at a maximum rate of one task every 50us For tasks that involve argument data such as information corresponding to a particular tone the argument data must be loaded int
26. MAX COM INC EV8380 COMMUNICATION SEMICONDUCTORS Evaluation Kit for CMX838 FRS PMR446 GMRS USER MANUAL Family Radio Processor e Evaluation Platform for the CMX838 e Windows software and PCMCIA card Reduces development time and risk acts as CMX838 host controller e Supports rapid prototyping Easily read write CMX838 registers e Convenient access to all CMX838 functions e Perform simple CMX838 control e Mic input jack experiments with tab delimited script files Speaker driver Speaker output jack e Off chip signal processing paths SMB connectors for synthesizer RF input charge pump output and reference oscillator input e Example scripts provided NGC99064 The EV8380 is an evaluation platform for the CMX838 Family Radio Processor It speeds development time by allowing CMX838 experiments to be performed without developing embedded host firmware The EV8380 includes a main PC board containing a CMX838 FRS PMR446 GMRS Family Radio Processor a PCMCIA card and Windows software The main board includes interfaces to all CMX838 sections including RF synthesizer RF input charge pump output with loop filter and synthesizer reference oscillator input audio mic jack mic bias source and speaker amplifier speaker output jack and host PC via PCMCIA card and software Windows software presents a type and click interface to CMX838 registers for read and write operations It also exe
27. ONTROL 88 register a Tx Mod 2 output set to Vbias b Tx Mod 2 output gain set to off Tx 1 output set to Vbias d Tx Mod 1 output gain set to off 14 Write 44 to SYNTHESIZER GENERAL CONTROL 84 register Synthesizer is enabled Lock detect IRQ is masked Magnitude of charge pump current is 40 Iset Positive VCO gain slope FRS channels selected 15 Write 01 to SYNTHESIZER CHANNEL SELECT 8B register a Bits 7 and 6 should always be set to zero b Lock detect comparison window set to 20ns c FRSchannel 1 selected 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 17 EV8380 User Manual 5 2 Tone Signaling Processor Examples NOTE that before any tasks can be issued to the tone signaling processor the baseband clocks must first be setup properly and running 5 2 1 How to Generate a Standard CTCSS Tone To select a pre programmed subaudio tone the user must first load the tone index i e argument data into the argument data register and then issue task 8 select subaudio tone from pre programmed list to the tone signaling processor NOTE To determine the value to load in the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register the power control and IRQ co
28. SEBAND CLOCK CONTROL 89 register to configure the CMX838 clock generation circuits For example if the external RF reference oscillator operates at 12 8MHz a byte of 90 will enable baseband clock generation from the external 12 8MHz reference oscillator 7 Circuit Schematics Three components on the EV8380 are socketed for quick replacement as necessary to support customer testing R3 a pullup resistor for the microphone is socketed to allow for different impedance microphones to be used with the EV8380 R15 is user selectable to allow for various charge pump current levels Jumpers E14 and E15 have solder links installed which direct the charge pump output current directly to the CPOUT SMB connector These jumpers can be modified to support various user selected charge pump current schemes 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies EV8380 User Manual 24 Evaluation Kit for CMX838 Family Radio Processor SSAXINNY LT ela 0001 QNOV 30001 7 lt 3 adas 13 lt er 4 WoL SENA 3nooo 569 001 2 su Cr g ZU gni g erg ere 2 1
29. UDIO LEVEL CONTROL 82 register a Audio signal is passed through deviation limiter and post deviation limiter LPF b De emphasis network is not bypassed c Volume control set to 0 0dB 5 Write 54 to AUDIO POWER amp BANDWIDTH CONTROL 83 register a Low power operation for modulation digitally controlled amplifiers DCA and microphone amplifier Low power operation for audio filters deviation limiter and audio level DCA Low power operation for de emphasis network and Rx Audio Out DCA d Post deviation limiter LPF configured for wideband output 6 Write 5035 to TX MOD 1 amp 2 CONTROL 88 register a Subaudio signal presented on MOD output b MOD output level set to 0 0dB c Audio tone presented on MOD1 output d MOD output level set to 2 5dB 7 Write 44 to SYNTHESIZER GENERAL CONTROL 84 register a Synthesizer is enabled b Lock detect IRQ is masked c Magnitude of charge pump current is 40 laser d Positive slope for VCO gain e FRS radio service selected 8 Write 01 to SYNTHESIZER CHANNEL SELECT 8B register a Bits 7 and 6 set to zero b Lock detect comparison window set to 20ns c FRSchannel 1 selected 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 16 EV8380
30. User Manual RX SETUP SEQUENCE 1 Write 40 to SYNTHESIZER BASEBAND CLOCK CONTROL 89 register a Baseband clock source supplied from external crystal b Bits 5 3 are don t care as CMX838 RF synthesizer clock is not used for baseband clock generation 4 0MHz crystal oscillator used for baseband clock generation 9 Write 3F to SETUP 80 register Rx Enabled RXIN selected as input signal source HPF output passed to deviation limiter input Rx O P enabled this bit should be set to 1 for CMX838 engineering samples 10 Write 1F to AUDIO CONTROL 81 register a First stage of audio filtering configured for pre emphasis response b Audio signal routed through HPF c Audio level gain stage between pre emphasis LPF and HPF set to 7 5dB 11 Write 99 to RX AUDIO LEVEL CONTROL 82 register a Deviation limiter is bypassed b Audio signal is passed through post deviation limiter LPF amp de emphasis network c Rx volume control set to 3 0dB 12 Write 54 to AUDIO POWER AND BANDWIDTH CONTROL 83 register a Modulation digitally controlled amplifiers DCA and microphone amplifier configured for low power consumption Audio filters deviation limiter and audio level DCA configured for low power consumption De emphasis network and Rx Audio Out DCA configured for low power consumption Post deviation limiter LPF set to wide setting Bit 0 is unused 13 Write 0000 to TX MOD 1 amp 2 C
31. X838 Auxiliary input output TP2 CMX838 Vbias TP3 CMX838 Microphone amplifier output Table 6 Test Points 2001 MX COM Inc www mxcom com tel 800 638 5577 336 7445050 fax 336 744 5054 4800 Bethania Station Road Winston Salem NC 27105 1201 USA Doc 20480230 001 All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 27 EV8380 User Manual Jumper Default Description Ref Position E1 Installed Enables crystal oscillator circuit E2 Installed Enables crystal oscillator circuit E5 Removed Connects V IN to AGND E6 Removed Connects VDD IN to PCV allows PCMCIA card to supply power to EV8380 E7 Installed Allows for current measurement for PC interface E8 Installed Allows for current measurement for SVDD P8 Installed Connects AGND to DGND E9 Installed Allows connection of VDD IN to V IN E10 Installed Allows for current measurement for AVDD E12 Removed Connects VDD IN to PCV allows PCMCIA card to supply power to EV8380 E14 Installed When used in conjunction with E15 this jumper allows various loop filter configurations E15 Installed When used in conjunction with E14 this jumper allows various loop filter configurations Table 7 Jumper List 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Wins
32. a Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 23 EV8380 User Manual 5 6 How to Utilize the External Signal Processing Paths The CMX838 supports the use of external signal companding and or scrambling by way of integrated circuit switched paths For example if it is desired to scramble the Tx audio signal the signal can be routed off chip by way of the AUDIO OUTPUT SELECT multiplexer bits 2 and 1 of SETUP register 80 The scrambler output can then be fed back into the CMX838 by the use of the AUDIO INPUT 2 SELECT multiplexer bits 4 and 3 of SETUP register 80 6 Hardware 6 1 Hardware Description 6 1 1 Operating Voltage There is no on board voltage regulator on the EV8380 The board was designed in this manner to allow for ease of testing at a variety of real world operating voltages As a result the EV8380 operating voltage Vpp is set by adjustment of the board s external power supply 6 1 2 Current Measurement CMX838 supply current may be directly measured by removing jumpers E7 computer interface current measurement E8 SVpp measurement or E10 Vpp measurement and replacing each removed jumper with a current meter 6 1 3 RF Connections There are three SMB connectors on the EV8380 to allow connections to external RF circuits 1 CPOUT SM1 on schematic Charge pump output current
33. cutes tab delimited text script files to automate command sequences The EV8380 supports all CMX838 baseband clock source modes including connected baseband clock crystal included derived from synthesizer reference oscillator and external baseband clock source The EV8380 main board can be used in a standalone manner or connected to external circuits for more complete system testing The main board is powered from an external 2 7 5 5VDC power supply The CMX838 data bulletin should be consulted during use of the EV8380 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 2 EV8380 User Manual CONTENTS SO CHON E A d b x DEBERE Page 1 Preliminary oan anam Ru eu Fh xk Rana an eR a eL Ek 4 1 1 Eaboratory eec ee etie oust Rove ie fb tte tendu bets 4 A EP En 4 1 2 4 Static Protection oid epe en Eod Eb idu fa vet bebo pi ped dada 4 1 22 Contents ute t oer teu e Pere beatis 4 2 General 1 M a 4 3 4 BREMEN OEE
34. e Tx or Rx amplifier gains powersave settings etc Example transmit and receive setup sequences follow More examples can be found in the example tab delimited files provided on the EV8380 CD ROM The actual initialization may vary depending on the specific application 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 15 EV8380 User Manual TX SETUP SEQUENCE 1 Write 40 to SYNTHESIZER BASEBAND CLOCK CONTROL 589 register a Baseband clock source supplied from external crystal b Bits 5 2 are don t care as CMX838 RF synthesizer clock is not used for baseband clock generation 4 0MHz crystal oscillator used for baseband clock generation 2 Write FF to SETUP 80 register a Tx enabled b Microphone amplifier output signal passed through Audio Input 1 Select switch to pre emphasis LPF network c Audio signal passed from HPF network output to LPF limiter input d Audio signal is not passed to de emphasis network 3 Write 1F to AUDIO CONTROL 81 register a First stage of audio filtering configured for pre emphasis response b Audio signal is passed through HPF c Audio level gain stage between pre emphasis LPF and HPF set to 7 5dB 4 Write 17 to RX A
35. e file is located When this file is found the tab delimited contents of that script file are translated into C BUS register commands and sent out to the CMX838 via the PCMCIA card interface 2 C BUS ADDRESS This text box contains the CMX838 register address in hex to which a read or write operation is about to be performed All of the following buttons and descriptions are referenced to the register address stored in this text box 3 FIRST DATA This text box stores the first byte of data in hex to be written to a CMX838 register 4 SECOND DATA This text box stores the second byte of data in hex to be written to a CMX838 register if required 5 FIRST READ This text box stores the first byte of data in hex that was read out of a CMX838 register 6 SECOND READ This text box stores the second byte of data in hex that was read out of a CMX838 register if required 7 WRITE 1 This button will cause one byte stored in C BUS ADDRESS to be written to a CMX838 register i e General Reset command 8 WRITE 2 This button will cause two bytes stored in C BUS ADDRESS and FIRST DATA to be written to a CMX838 register i e one address byte and one data byte 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX
36. ented at either or both of the TX MOD 1 or 2 outputs Generate a ringing alerting tone and have it presented at the AUX I O or RXOUT pin The setup beyond this point depends on the desired testing to be performed The addition of appropriate signal sources equipment will allow the user to exercise the CMX838 as follows this is not an all inclusive list 1 Detect a single standard CTCSS tone 2 Detect a user defined subaudio tone 3 Detect a tone from a user defined set of tones i e a tone watch list 4 Perform tone cloning by rapidly scanning the received signal for the presence of any one of the 50 TIA 603 standard CTCSS tones and providing indication of the detected tone 5 Perform various filtering functions low pass high pass band pass pre emphasis de emphasis to allow the user to observe their respective frequency responses 6 Apply a square wave melody tone signal to the AUX I O pin such as might come from a host uC and allow the CMX838 filters to create the desired melody tone output 7 Apply an audio signal to the CMX838 i e from a microphone have the CMX838 generate a CTCSS tone and use the digitally adjustable gain stages to individually trim the audio and sub audio signals prior to their delivery to the TX MOD 1 amp 2 modulation drivers 8 Adjust the TX modulation output level by manipulating the digitally adjustable TX MOD 1 amp 2 gain stages 2001 MX COM Inc www mxcom com tel 8
37. er than Soft Reset or Fast Initialization ensure that the required argument registers are not updated for at least 50us after the corresponding task has been issued 6 determine the data byte that should be loaded into the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register the power control settings and the IRQ settings should be logically OR ed with the desired task field The resulting byte should then be loaded into the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register 4 2 4 Power Up Initialization Sequence for CMX838 The tone signaling processor of the CMX838 should be fully initialized after the chip is powered up The first time the tone signaling processor is enabled after power is applied to the CMX838 a byte should be written to the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register with the task field set to F This setting will clear the configuration memory and place the tone signaling processor in a Fast Initialization mode When the CMX8368 tone signaling processor is in this mode the tone encoders and decoders do not run To resume normal operation after all initialization is completed a byte with the task field set to 0 should be written to the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register The following sequence should be utilized when applying power to the CMX838 i e after turning on the EV8380 This sequence only needs to be executed upon cold power up For example issuance of a Genera
38. has a maximum duration but is terminated when the CMX838 asserts its hardware interrupt Script Description NOTE command T Pause for the specified number of 10uS ticks written in decimal The maximum valid form e g an argument value of 6500 yields a pause duration of argument value is 6500 65mS Pause for the specified number of 1005 ticks in decimal form but The maximum valid terminate the pause immediately upon receiving a CMX838 argument value is 6500 interrupt Table 4 Pause Type Commands NOTES 1 Argument must be in decimal form without any preceding characters such as Od 2 The 1 script command is the letter not the letter L 3 2 6 4 Script Example A short segment of sample script follows Note there are tabs between each field that are not visible in this document general reset W1 01 W2 89 40 clock control base band from XTAL 4MHz T 6500 pause 65mS T 6500 pause 65mS T 6500 pause 65mS W2 80 DE TX mode Aux I O Selected HPF Out to LPF Lim In W2 81 61 LPF 7 5 dB Gain W2 82 24 Bypass de emphasis Rx out Gain 28 5 dB W2 83 56 audio lowest current mode with Narrow Band LPF W3 88 503F Audio amp Sub audio on Mod2 0488 Audio on Modi 7 5dB W3 97 1010 Sub Audio Analog Levels 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Win
39. he AUX I O pin must be configured to internally connect to the audio tone generator output When the AUX I O pin is configured in this manner external connections to the AUX I O pin may load and affect the audio tone generator output If desired the AUX I O pin may also be internally switched to drive the CMX838 audio processing path to filter and pass an audio tone to both loudspeaker and TXMOD1 and TXMOD2 output pins This allows the CMX838 to internally generate an audio tone and internally connect it to the audio processing path using the AUX I O pin to do so If desired the generated audio tone may be driven off chip via the AUX I O pin without also internally connecting it to the CMX838 audio processing path 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 18 EV8380 User Manual 5 2 3 1 Set the Audio Tone Frequency To program the CMX838 to generate a user defined audio tone the user must first compute the argument data according to the following formula Argument mro Sees 100000 where f is the tone to be transmitted Load the binary equivalent of the argument data into 16 BIT SUBAUDIO TASK DATA register 8E then issue task 10 program audio frequency ringing tone NOTE To de
40. l Reset command after power has been applied does not require the execution of this initialization routine 1 Apply power to the EV8380 2 Issue General Reset single C BUS write of 01 3 Write 4F to the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register b This applies a soft reset to the subaudio section of the CMX838 clearing its configuration memory 4 Wait 250us for the Soft Reset task to complete 5 At the end of the 250us delay the CTCSS processor will automatically be in the Fast Initialization mode The tone encoders and decoders do not run while in this special mode Please review section 4 2 1 and the CMX838 data bulletin for more information on the Fast Initialization mode 6 Configuration of the CMX8368 tone signaling processor can now be performed as desired 7 Oncethe configuration is complete a task of 0 should be written to the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register in order to resume normal operation The initialization procedure is now complete After these steps have been performed other registers should be set as necessary to achieve desired operation i e audio path switching gain levels baseband clock generation etc 5 Programming Examples 5 1 Device Setup The following sections provide specific instructions on how to program the CMX838 to perform some of its functions but in a typical application the CMX838 will also require some setup instructions i
41. m com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 11 EV8380 User Manual 4 General Notes 4 4 Baseband Clock Generation The CMX838 offers considerable flexibility in the choice of clock sources Baseband circuits on the CMX838 can receive their clock from any of the system RF reference oscillator i e VC TCXO a dedicated crystal oscillator or an externally applied clock signal of suitable frequency and amplitude 41 15 Using the RF Reference Oscillator as the CMX838 Clock Source The desired mode of CMX838 operation involves the derivation of the baseband clocks from an external RF reference oscillator When the device is operated in this manner all CMX838 circuits RF and baseband are synchronized to the same clock signal Eight different RF reference oscillator frequencies from 4 0MHz to 21 25MHz are available for CMX838 baseband clock generation please refer to CMX838 data bulletin for details on available frequencies To operate the CMX838 with an RF reference oscillator as its baseband clock source 1 Connect an external RF reference oscillator to connector SM3 on the EV8380 board Please note that the reference oscillator frequencies compatible with the CMX838 are listed in the CMX838 data bulletin 2 Write a data byte to
42. mple the actual center frequency would be 64 97 Hz NOTE To determine the value to load in the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register the power control and IRQ control bits should be logically OR ed with the desired task field For example a C BUS sequence to enable detection of a 65Hz tone user defined would be 1 Write 07CE to 16 BIT SUBAUDIO TASK DATA 8E register a This is the required argument data for 65Hz tone 2 Write 45 to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register a Task 5 command No IRQs enabled 3 Wait 250us 4 Write 3F to SUBAUDIO TASK DATA 95 register a Task 4 argument data to disable all decoders 5 Write 44 to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register a Task 4 command No IRQs enabled 6 Wait 250us 7 Write B3 to SUBAUDIO TASK DATA 95 register a Task 4 argument data to enable decoder 51 The user definable one 8 Write 64 to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register a Task 4 command with IRQs enabled 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 21 EV8380 User Manual 9 Wait 250us 10 Write 60 to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register a Task 0 command to place device normal run mode with IRQs
43. nia Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 3 EV8380 User Manual 5 5 1 Howto Manipulate the Tx MOD 1 amp 2 Outputs 22 5 6 How to Utilize the External Signal Processing 23 6 M A TT er 23 6 1 Hatdware DEScriptlo Sastre ot aerate teste d apr 23 64 1 Operating Voltage te epe i my beta e eode ae aoe ial as 23 6 1 2 Current Measurement ssssssssssssssseseeee nennen nnne 23 6 137 RF Connections soto tme e oki eec 23 61 4 Olock Oscillator 2 iine hte ia Hp De Ha p EE De 23 7 Circuit Schemali cS 23 8 SIG MAU Lisi suada baci na tar nay Ga ER B FOU Fa ER S 25 9 Performance SpecificaliOn neenon tuta annua nran tu gu cc en a uana ran noun an LE a a anao 28 9 1 Blectrical PSrrormahi6e pen eden RH ea um ERE aca 28 9 1 1 Absolute Maximum Ratings ssesseeeneeeneneneeenen enne enne 28 93 2 Operating Limits casu ep e e 28 9 1 3 Operating 5 ethernet nnns nennen nene 28 MX COM Inc
44. ntrol bits should be logically OR ed with the desired task field For example to set up the CMX838 to transmit an 114 8Hz tone standard CTCSS tone the required C BUS sequence would be 1 Write 11 to SUBAUDIO TASK DATA 95 register 2 Write 48 to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register 5 22 to Generate A User Defined TX Subaudio Tone To program the CMX838 to generate a user defined subaudio tone the user must first calculate the argument data according to the following formula 100000 where f is the tone to be transmitted Load the binary equivalent of the argument data into 16 BIT SUBAUDIO TASK DATA register 8E then issue task 9 program user defined subaudio tone to the tone signaling processor NOTE To determine the value to load in the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register the power control and IRQ control bits should be logically OR ed with the desired task field For example to set up the processor to generate a 65 Hz tone the required C BUS sequence would be 1 Write 05FE to 16 BIT SUBAUDIO TASK DATA register 8E 2 Write 49 to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register Argument 5 2 3 How to Generate an Audio Tone at the AUX I O Pin The CMX838 audio tone generator produces ringing alert square wave tones at user defined frequencies It can also filter those audio signals to make them more sinusoidal To use a generated audio tone signal t
45. o the argument register first After the argument data has been loaded the appropriate task should then be loaded into the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register a Once argument data has been passed to the argument register no delay is required before writing the corresponding task to the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register After a task has been loaded into the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register a minimum wait time of 250us must be observed before modifying the contents of any argument data register 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 14 EV8380 User Manual 5 If the CMX838 is placed in its Fast Initialization mode either directly or indirectly through the issuance of a Soft Reset task a initial delay of 2505 must be observed before the next task can be written to the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register b Once this initial 250 delay has been observed tasks can be issued to the device at a maximum rate of one task per 50us Any argument data required for the next task may be loaded into the argument register during this initial 250us delay c While in the Fast Initialization mode for tasks oth
46. one with task 10 and then enable the AUX I O pin output with task 14 Write 0986 to 16 BIT SUBAUDIO TASK DATA 8E register Write 4A to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register Wait 250us Write 85 to SUBAUDIO TASK DATA 95 register 5 Write 4E to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register If the CMX838 is already in the Tx mode the newly programmed tone will immediately begin to be transmitted cn Note that once the audio tone generator is enabled the frequency can be changed by reissuing task 10 5 2 4 How to Detect a Standard CTCSS Tone To program the CMX838 to detect a standard TIA 603 CTCSS tone the user must first load the argument data corresponding to the tone of interest into the argument data register then issue task 4 enable disable tone detector to the tone signaling processor NOTE These steps can be repeated as needed to configure a tone watch list but a special mode can be used to quickly enable disable multiple detectors see section 5 2 5 for more information 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 19 EV8380 User Manual The argument data has the following format in the SUBAUDIO TASK DATA 95 register Bit 7 Bit 6 Bit
47. or CMX838 Family Radio Processor 20 EV8380 User Manual 4 Write the following values to the SUBAUDIO TASK DATA 95 register a 81 to enable tone detector 1 67 0 Hz value 0x80 0x01 then wait 50us minimum 87 to enable tone detector 7 82 5 Hz then wait 50us minimum 8A to enable tone detector 10 91 5 Hz then wait 50us minimum 8C to enable tone detector 12 97 4 Hz then wait 50us minimum 92 to enable tone detector 18 118 8 Hz then wait 50s minimum f 94 to enable tone detector 20 127 3 Hz then wait 50us minimum 5 Write 40 to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register a This step includes power control IRQ control and the issuance of task 0 to place the device back in normal running mode 5 2 6 How to Detect a User Defined Subaudio Tone Task 5 program user defined subaudio tone effectively programs the center frequency of user programmable detector 51 To detect the presence of a user defined subaudio tone the user must first calculate the argument data corresponding to the desired tone according to the following formulas coe es 100000 RINT 0525112 96 f Argument N 64 R The argument data for 65 Hz would be 31 64 14 1998 07CE The argument data is loaded into the argument data register and task 5 is then issued to the tone signaling processor The programmed center frequency can be back calculated by pe 100000 N 96 511 R In the above exa
48. r own tab delimited text files and use them with the SEND FILE utility Any files created for this purpose should be tab delimited and should be saved as txt files 3 2 6 Creating EV8380 Text Script Files EV8380 script files are tab delimited text files that contain a sequence of specific C BUS read and write operations to automate control of the CMX838 installed in the EV8380 These files may also include comments to make them easier to understand 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 8 EV8380 User Manual EV8380 GUI scripting is provided as a simple tool to support rapid development It is not a complete programming language with conditional branches syntax checking bounds checking etc so the users must ensure their scripts are accurate 3 2 6 1 Script Command Types and Syntax Script commands are of two types C BUS operations and script directive Their syntax is shown in the below Script Syntax Notes Command Type C BUS command lt tab gt register lt tab gt argument e The selected C BUS register address determines whether an argument is required and its size e Both C BUS register address and argument if any must be in hexadecimal form without any preceding
49. red shift 3 019 unsigned FE64 signed Frequency shift is negative so load FE64 the first four bytes of the signed version of 019C into SYNTHESIZER 1 OFFSET 80 register If the IF shift were a high side shift of 21 4MHz 21 4MHz 12 5kHz 1712d 06B0 unsigned This means that for a high side IF shift of 21 4MHz a value of 50680 should be loaded into the SYNTHESIZER 1ST IF OFFSET 8D register Additionally if the PMR446 service 6 25kHz channels is being used and a low side IF shift of 45MHz is required 45MHz 6 25kHz 7200d 1C20 unsigned E3E0 signed So a value of E3E0 should be loaded into the SYNTHESIZER 1ST IF OFFSET 80 register to accomplish a low side IF shift of 45MHz with the PMR446 radio service 5 5 Modulation Section Programming Example 5 5 1 How to Manipulate the Tx MOD 1 amp 2 Outputs The TX MOD 1 amp 2 outputs were designed with flexibility in mind These output modulation drivers can independently be programmed to present either 1 Vbias 2 audio 3 inverted audio 4 subaudio tone 5 inverted subaudio tone 6 audio subaudio tone 7 inverted audio subaudio tone The Tx MOD 1 amp 2 outputs can be configured by writing two data bytes containing the desired configuration settings to the Tx MOD 1 amp 2 CONTROL 88 register 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethani
50. s 5 0 Tone detector index number 1 51 Additionally using index 63 can enable or disable all detectors while issuing just one task Enabling index 62 enables detection of all TIA 603 Tones There is no single command to disable just the TIA 603 Tone Detectors instead use index 63 to disable all detectors 1 enable Don t O disable care NOTE To determine the value to load in the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register the power control and IRQ control bits should be logically OR ed with the desired task field For example to configure the CMX838 to detect a 67Hz tone 1 Write 81 to SUBAUDIO TASK DATA 95 register 2 Write 64 to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register 5 2 5 to Quickly Enable Disable Multiple Detectors Task 13 places the tone signaling processor in a mode that allows multiple detectors to be quickly configured Just as for task 12 neither the tone encoders nor the tone decoders operate in this mode The argument data for this task is defined as for task 4 enable disable tone detector When task 13 is executed the tone signaling processor reverts to Fast Initialization Mode when any other task is issued To return to normal operation task 0 normal operation must be issued to the tone signaling processor NOTE When enabling or disabling tone detectors with task 13 the argument data in the SUBAUDIO TASK DATA 95 register has the following format
51. ston Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 10 EV8380 User Manual 3 3 EV8380 External Connections Primary d e e 1112 ups Second set of C BUS CMX838 interface signals is C BUS IRQ a J1 2 J4 8 IRQ2 exposed at a connector to support user interface i i signals Reply Data 71 1 J4 6 Reply Data 2 implemented daisy Sre chained board configurations exposed Command Data J1 11 J4 4 M Command Data controlled by a single ata 2 PCMCIA card connector _ Serial Clock 71 10 74 2 4 Serial Clock 2 _ Figure 1 EV8380 PC and C BUS Connections Rx Input P5 1 2 P2 1 2 E V V To support Rx Output P3 1 2 2 3 4 user added external V V gt companding and scrambling TX MOD1 7 P4 1 2 2 5 6 processing Output TX MOD2 P4 3 4 9 P2 7 8 Bu Output Mic input 59 73 Speaker Output AUXIO gt p5 3 4 Figure 2 EV8380 Baseband Signal Connections RF input from external sm2 VCO Charge pump output NU SM3 current to external Input from external VCO loop filter synthesizer reference 1 oscillator e g TCXO Figure 3 EV8380 RF Connections 2001 MX COM Inc www mxco
52. termine the value to load in the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register the power control and IRQ control bits should be logically OR ed with the desired task field For example to transmit a 620Hz tone the required C BUS sequence would be 1 Write 0986 to 16 BIT SUBAUDIO TASK DATA register 8E 2 Write 4A to SUBAUDIO PROCESSOR GENERAL CONTROL 93 register 5 2 3 2 Internally Connect the AUX I O Pin to the Audio Tone Generator To internally connect the audio tone generator output to the AUX I O pin argument data for the AUX I O pin configuration must be loaded into the argument register and task 14 configure aux pin as output should then be sent to the tone signaling processor The argument data for AUX I O pin configuration has the following format in the SUBAUDIO TASK DATA 95 register Bit 7 Bit 6 3 Bit 2 0 These bits are Don t Care if Bit 7 is a logic O Bit 2 Bit1 BitO AUX I O pin output signal 1 enable aux 1 0 0 RX Decode Status bit pin as output 1 0 1 Audio Tone O enable aux 1 1 0 Output logic 0 pin as input 1 1 1 Output logic 1 NOTE To determine the value to load in the SUBAUDIO PROCESSOR GENERAL CONTROL 93 register the power control and IRQ control bits should be logically DR ed with the desired task field For example to have the CMX838 produce a 620Hz ringing tone and present the tone the AUX I O pin set up the audio t
53. the SYNTHESIZER BASEBAND CLOCK CONTROL 89 register to configure the CMX838 clock generation circuits For example if the external RF reference oscillator operates at 12 8MHz a byte of 90 will enable baseband clock generation from the external 12 8MHz reference oscillator When the CMX838 is operated with an RF reference oscillator as its baseband clock source the normal mode of operation for the CMX838 on chip crystal amplifier is disabled 4 1 2 Using External Sources as the CMX838 Clock Source If it is not desirable to use the RF reference oscillator as the device clock source the CMX838 can develop its baseband clock from an external clock source a crystal oscillator or a system clock signal can be used in this situation Eight different frequencies from 4 0MHz to 24 0MHz are available for CMX838 baseband clock generation when operated in this manner please refer to CMX838 data bulletin for details on available frequencies 4 1 2 1 Operating the CMX838 from a Crystal Oscillator To operate the CMX838 with an external crystal oscillator 1 Connect crystal of desired frequency to the X1 socket on the EV8380 a The EV8380 board is shipped from the factory with a 4 0MHz crystal b Ifadifferent crystal frequency is desired please consult the CMX838 data bulletin for other supported crystal frequency choices c Please consult the CMX838 data bulletin for recommendations concerning crystal type drive levels etc 2 Ensure jumpers
54. ton Salem NC 27105 1201 USA All trademarks and service marks are held by their respective companies Evaluation Kit for CMX838 Family Radio Processor 28 EV8380 User Manual 9 Performance Specification 9 1 Electrical Performance 9 1 1 Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the Evaluation Kit Min Max Units Supply Vin Vin 15 15 Supply Vpp Vss Vss 0 3 7 0 Voltage any pin to Vss 7 Current into or out of V pin 100 mA Current into or out of Vpp iN pin 100 mA Current into or out of V pin 35 mA Current into or out of any other pin 30 mA Storage Temperature 0 55 C Operating Temperature C 9 1 2 Operating Limits Notes Min Max Units Supply Vin E9 jumper 2 7 15 removed Supply Vpp Vss 2 7 5 5 Operating Temperature 10 40 C 9 1 3 Operating Characteristics For the following conditions unless otherwise specified Evaluation Device Xtal Frequency 4MHz Vpp 2 7V or 5 0V Tamp 25 C Notes Min Typ Max Units DC Parameters Ipp evaluation board idle 17 5 30 mA 9 1 3 1 Timing Diagrams For CMX838 timing information refer to the current MX COM CMX838 Data Bulletin 2001 MX COM Inc www mxcom com tel 800 638 5577 336 744 5050 fax 336 744 5054 Doc 20480230 001 4800 Bethania Station Road Winston Salem NC 27105 1201 USA All
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