EVBmm User Manual
Contents
1. EV Bann L ECTNEUEICRECIEEN 1 Many ideas one solution Socket AB Socket CD S ENTE RTE LEE I II 5452988065 zugnz S4ABeessReessacce yee SER ERB ETERS wo RE BSF GND JUMPER GND JUMPER BOTTOM PCB BOTTOM pix CODEC AUDIO HEADPHONE LINEOUT Ang Title EV Bann Date 12 01 2008 Sheet 2 of 2 32 AP Many ideas one solution2. Li ABABABABABAB CD co o 5 Er EH EX um 175 y OC Cn Uu N amp EBEN T 0 w8 D B D HOST_USB COHK p 1 ALCD LEp4 e RESET 8 o Figure 1 Component layout on the EVBmm AP Many ideas one solution Components Supply connector USB B Device connector RS232C connectors CAN interface Jtag connector for in system debbuging programing ARM microcontrollers External connector to connecting peripheries and connector Input output analog audio codec connectors IRDA transceiver 1 Wire connector 10 RESET switch 11 Potentiometers 12 Switches 13 LEDs 14 SD MNC slot 15 Power switch 16 Alphanumeric LCD 2x16 connector 17 Graphic LCD 128x64pix connect 18 Buzzer 19 Internal part mm sockets for minimodules 20 Peripheries devices 21 USB Host connector Construction of Evaluation System is allowing to implement FPGA minimodules based on XILINX Spartan3 02 and 12 devices selective series of MMnet minimodules Working on this System we have took into consideration our future minimodules ion Hardware description 3 1 Power supply The board c
3. EVBmm Evaluation system for microcontrollers ARM and minimodules PROPOX User Manual REV 1 1 Contents IHFOGOUOCHON eet ERE E 3 EV BIE siehe ct E tha ld asta Mee 4 started 5 2 1 Component NAV OU sete ditioni vata 5 Hardware descHpliol eee aite eee itii es 7 3 1 Power SUPPLY ois a 7 3 2 socket for 8 SG LED ot Dd 10 Dd ea 10 39 APA t bx tr a na Ma 11 3D Anta 11 TAVITA CS ch cs T 12 PRE OE TUTOR ettet aa vena 12 3 Q USB 4 4 e a 12 3 9 Interfejs USB ie i UO eni 14 2 TO HO 232 IDIGHBICOS 14 AVI SIOECBRO s sito e e ba ote eiua 16 Ore gg 67 0 16 3 13 Alphanumeric LCD dISDISy eise deret i on eni
4. 5 B3 TMS 85 RICK 124857 CS2 DBGACk b 3 0 GNC Figure 5 Minimodules process installation On the bottom side board close goldpins of mm sockets are placed solder pads jumpers allowed to connect GND of board direct to minimodule By means of the solder pads we can direct connect A20 D1 and D1 pins of mm socket to GND of board Figure 6 Pads jumpers of GND Depending on version of installed minimodule we short only one in three solder pads jumpers Figure 6 This solution allowed to shorten ground path WARNING Make sure that power supply of minimodules is connected correctly Reverse of polarisation or overvoltage 5V instead 3 3V can cause damage of minimodule Many ideas one solution 3 3 LED diodes The EVBmm has 8 LED diodes which play the role of the simplest interface between the system and the user The board is constructed in such a way that it allows any connection between the diodes and minimodules leads A diode lights up when a low signal level is applied to appropriate leads The LED current flowing into the microcontroller pin is about 3 5 mA E RIO 470R LEDS hy LEDs 470R 4708 Figure 7 Implementation of LED diodes 3 4 Switches The EVBmm is equipped with eight microswitches Pushing a switch causes the corresponding SWx to be pulled low while releasing it will result in 3 3V on the appropriate switch he
5. HS data instruction select line E display enable line strobe line DBO DB7 8 bits data line LCD backlight can be permanently turned on by closing jumper LGT and GND on ALCD connector or can be controlled by any microcontroller pin The adjustment of contrast may be done by GLCD CTR potentiometer m 1110 GND DBO DB2 DB4 DB6 CSI RST RS OV A 4 LCD GRAPH Figure 23 Implementation of graphic LCD 19 ion 3 15 CAN interface Evaluation board has CAN interface based on the 3 3V CAN transceiver SN65HVD230 from Texas Instruments with terminalblock e CANH GND GND CAN RX L Hi 33 Vef R P GND GND R63 906 3H SLOPE m GND Ull Rs CANL SN65HVD230 3 3 lt C39 100nF o Figure 24 Implementation of CAN interface Both high speed mode and slope control mode are available and can be selected by setting HIGH SLOPE jumper CAN terminal resistor 1200 is enabled when JP12 jumper marked as TERM is closed Signal line of CAN are available on J22 header marked as CAN 3 16 IRDA On the EVBmm board placed infrared transceiver TFDU4100 compliant to the IRDA 1 2 standard for serial infrared SIR
6. CAN interface buzzer SD MMC slot card codec audio 1 Wire connector and IRDA transceiver Optionally board can be equipped in Alphanumeric LCD Display or Graphic LCD Display 128 x 64 pix resolution with 50108 controller All these elements are accessible through pin connectors permitting their connection with any processor port This approach supported Flexibility technology and allowed to connect any pin of microcontrollers or Propox minimodule The board contains also a power supply which relieves the user from the need to provide a regulated supply voltage Together with the board we deliver development tools as well as demonstration software The EVBmm along with the minimodule can be also used in didactic laboratories of informatics colleges and universities It can be also used to build circuits realizing thesis projects We wish great success and full satisfaction while designing and constructing applications bases ion 1 1 Features List of main features of EVBmm are as follow Connector with all terminals of the minimodule Connectors of all peripherals accessible on board JTAG connector for in system programming and debugging Voltage regulators 5 4 3 3 Possibility supply with USB port Power switch 8 switches and 8 LED diodes Buzzer 2 potentiometers IRDA port USB Device amp USB Host ports Two ports RS232 with LEDs Codec Audio CAN Interface 1 WIRE
7. D12 1 Dia pis 718 C292 L cs0 __2 221 1 100n 100n 4 GND LLLI eem x GND N N e N 1 14 x v GND E C33 MAX3232CSE 0 GND 100n DB9F GND GND Figure 17 Implementation of RS232 interfaces Many ideas one solution 3 11 MMC SD slot card The board EVBmm has built in SD MMC card connector Its signal are led to J18 connector marked as CARD Used are only those lines needed to SPI mode 16 SD MMC CARD DAT2 CD DAT3 CMD DI GND CLK SCLK GND DATO DATI CARD CS 5 50 INS 9 UNL SD MMC Figure 18 Implementation of SD MMC slot card Additionally card connector has switches informing about card status which also are connected to Card connector The contacts of switches are pull up by 10k resistors to 3 3V supply Active contact shorted line to ground Meaning of these switches is explained in table INS UNL Statuscard 1190 1 Inserted locked 0 Inserted unlocked Card not tolerant voltage levels above 3 3V Make sure that power supply WARNING SD MMC card can operated only with 3 3V logic levels AN microcontroller is 3 3V 3 12 JTAG Connector Programming debugging of module can be done through JTAG interface JTAG is a four lead interface permitting the takeover of control over the processor s core The possibilities offered by th
8. Master Output Slave Input CLKle elmrso CLK Clock Line INS 9 9 UNL MISO Master Input Slave Output INS Insert Card signalization UNL Lock Write signalization USB device header e m DP USB D USBD IRDA header IRDA i es GND ground TXd RXd SC Sensitive Control TXd data input RXd data output ion 24 AUDIO CODEC header CODEC GND Ground GND MCK MCK External Master Clock Input 58 9 MODE 5 SPI Chip select LRCIN DIN MODE SPI 2Wire selection BCLK cLkour SDIN Data line input for SPI and TWI LRCOUT DOUT SCLK Clock line inut for SPI and TWI Left Right Clock Input DIN Digital Input for audio data BCLK Bit Clock for audio data CLKOUT Clock Out for audio data LRCOUT Left Right Clock Output for audio data DOUT Digital Out for audio data JTAG connectors VCC emulator supply ins Vref target voltage sense cup 5 RESET reset for JTAG chain cup TDI JTAG Test data input cip TMS JTAG Test Mode select GHD JTAG Test Clock ES TDO JTAG Test Data Output NSRST RESET signal cup Ground RTCK Return Clock DBGRQ Debugger request DBGACK Debugger Acknowledge JTAG nTRST TDI TMS TCK RTCK TDO nSRST DBGRQ GND 25 ion 4 2 Jumpers Jumper Function PWR USB Board 5V power supply from USB
9. bus Default setting Not fitted HI SLOPE In HI position CAN interface operated in High Speed mode In SLOPE position CAN interface operated in Slope Control mode Default setting HI TERM CAN terminal resistor 120R is enabled when jumper TERM is fitted Default setting Not fitted S M CLK Master Slave clock Audio Codec When jumper is set M position codec is clocked external clock source passed on MCK pin In set S position codec clocked with 12MHz crystal oscillator Default setting M HP LIN In HP position allowed to connect headphones to OUTPUT Jack In LINE position allowed to connect audio amplifier to OUTPUT Jack Default setting HP JRST Connecting system RESET with JTAG Reset Default setting Not fitted 4 3 LEDs amp switches Name Function POWER led The RED Led is directly connected to the 5V supply The power led is always lit when power is applied to GrandEVBavr RESET The RESET push button caused low level on RESET header 26 ion Troubleshooting Guide Tabela 2 Problem Problem Reason Solution The red power LED is not on Supply cable not connect Connect supply power cable to the DC jack Wrong supply power Check that the power supply is of type 9 15V Power switch off Turn on the power switch UART serial communication does not work properly Signals UART RxD and TxD are not connect to minimodules port Con
10. data communication supporting IRDA speeds up to 115 2 kbit s Signal line of transceiver are available on J33 header marked as RDA R65 SR2 IRDA 100nF OuF 6 3V GND Figure 25 Implementation of IRDA transceiver The Sensitivity Control pin SC allows the minimum detection irradiance threshold of the transceiver to be lowered when set to a logic HIGH ion 2 3 17 Codec Audio The board has audio codec TLV320AIC23 Texas Instruments The TLV320AIC23 is a high performance stereo audio codec with highly integrated analog functionality The analog to digital converters ADCs and digital to analog converters DACs within the TLV320AIC23 use multi bit sigma delta technology with integrated oversampling digital interpolation filters Data transfer word lengths of 16 20 24 and 32 bits with sample rates from 8 kHz to 96 kHz are supported The TLV320AIC23 has an integrated analog features consist of stereo line inputs with an analog bypass path a stereo headphone amplifier with analog volume control and mute and a complete electret microphone capsule biasing and buffering solution Configuration devices is possible trough 2 or SPI interface SCL SDA MODE CS pins Digital Audio stream 125 standard thus Left Justified Right Justified or DSP is available on LRCIN DIN BCLK LRCOUT DOUT CLKOUT pins on CODEC header ROUT 13 C50 100uF t SCLK
11. we force a low state on the RESET connector Can be used to reset of the ARM minimodule RESET 132 RESET RESET GND Figure 12 Implementation of RESET button 3 9 USB interface Board is equipped with USB interface connector USB allows connection with PC or other USB host and transfer data with up to 1MB s speed Along with USB connector there are RC filtering circuits and jumper PWR_USB JP1 for connecting USB bus power with board 5V voltage ion 12 C16 100n GND GND GND Figure 13 USB connector Solution with jumper allows drawing up to 100mA from USB bus To draw higher current up to 500mA accordingly to USB 1 1 or 2 0 specifications power switch should be used Software should turn on this power switch after successful enumeration Example of power switch is shown below it is not implemented on the board VCC USB 45V USB 100nF Figure 14 Example of USB power switch it is necessary for drawing more than 100mA from USB bus USB host recognize presence of full speed device on the bus by sensing pull up on D line Example pull up circuit not implemented on board shown on drawing bellow 01 R12 43 3V _USBDP gt lt lt UDP_PUP Figure 15 USB D pull up circuit implementation Many ideas one solution 13 Pull up is by default turned off by R13 resistor Active reset signal or low level on UDP PUP line turn
12. 18 3 14 Graphi display GLOD c uos i tent een De etui ua 19 ONSE GENI MR ER 20 ut en LA i uM 20 SC iu dst 21 Header and Connectors n e e Hit en e 23 23 LEAN VIO MR IRE 26 4 3 LEDS SWIGIS d icu t br etu etait d ir ES 26 Technical Data te Fe ele 28 Technical Assistanc ette oie etate d oie 29 Atala te atat ineo 30 Warranty Statement nerais oe ERU p Ete DD Cb Reip 30 ion Introduction System evaluation Evaluation Board for Mini Modules Team is tool to designed to building electronic systems based on 32 bit microcontroller ARM and Propox minimodules This flexible base will allow You to create and verify projects and shark ideas quick and easily Our remedy idea many ideas one solution was implemented in this project That is the reason why we ve created Evaluation System able to handle most of Propox minimodules which to fit dimensions into mm socket Additionally working on this System we have took into consideration our future minimodules based on ARM microcontrollers The board houses also such peripherals as LEDs push buttons potentiometers a LCD display a RS232 interfaces
13. SDN RHPOUT 51 cs HEADPHONI LINE OUT OUTPUT AVDD LHPOUT LOUT GENIS Cap Poll Resl BLMIS C52 luF R55 4K7 RLINEIN 112 AGN 357 BVDD e DVDD Inductor j 45 8 de es CLKOUT CLKOUT BCLK BCLK GND GND INPUT LUNEN 2 MASTER SPY 185 Z 2 SLAVE MICIN VMID MICBIAS MIC 5 DGND HPGND AGND TLV320AIC23B AGND AGND Inductor L13 18 AGND GND Figure 26 Implementation of audio codec On board placed three stereo audio Jack connectors OUTPUT connector allows connect headphones jumpers set HP or stereo audio amplifier jumper set LIN INPUT connector is line inputs for left and right audio channels MICIN is a high impedance low capacitance input that is compatible with a wide range of microphones It has programmable volume control and a mute function The TLV320AIC23 can operate in master or slave clock mode In the master mode jumper S M CLK is set M position the TLV320AIC23 clock and sampling rates are derived from a 12 MHz crystal MCLK signal In Slave mode jumper S M CLK is set S position MCK signal is derived from external source i e from microcontrollers and fitted on MCK 1 ion pin Default CODEC jumpers are set for Master mode and Headphones Output as shown Figure 26 S M CLK HP LIN Figure 27 Default CODEC jumpers For m
14. ader connector 3 3V 10k SWn SWn GND Figure 8 Implementation of switches 10 ion 3 5 Buzzer The board EVBmm has a built in acoustic signaler controlled by logic low state through a transistor The base of the transistor is connected to connector MISC as BUZZ 3 3 3 3V R23 10k R6 10k BUZZ s HISC wi C17 100n BUZZER GND GND Figure 9 Implementation of buzzer 3 6 Potentiometers Board EVBmm has two potentiometers POTO and 1 The potentiometers can be used to simulate the outputs of analog circuits The voltage across POTx terminals can be adjusted in the 0 3 3V range The leads of potentiometers are available on MISC connector POT2 3 3V MISC son POU P2 10k 10k ADJO GND Figure 10 Implementation of potentiometers 1 1 ion 3 7 1 WIRE Interface The EVBmm board has a 1 Wire bus connector This connector be used to connect e g a digital 051820 thermometer or Dallas Maxim iButton reader from The data signal has been applied to the MISC connector and designated as 1 W It can be connected to any microcontroller lead out by means of the attached cable 43 3V 433V n HISC 100R 1 I WIRE GND Figure 11 Implementation of 1 Wire 3 8 RESET button The is equipped with an on board resetting button by pressing it
15. an be supplied in two ways e From an external power supply with an output of 7 12 V AC or 9 15 V DC having a standard plug with a bolt diameter of 2 1 mm connected to supply socket J3 In case of a DC supply voltage its polarity is irrelevant From USB connector In this case JP1 jumper should be closed Board houses also USB power switch which allows drawing up to 500mA from USB bus Warning Both supply methods should be used simultaneously Fixed voltage 5V and 3 3V is obtained from LM7805 and SPX2920M3 3 3 standard IC regulator Can be used to supply microcontroller minimodules and peripheries such as character ALCD and graphic GLCD Maximum output current is 400 3 3V voltage and 600mA for voltage Voltage outputs are available on the headers J1 5V and J15 3 3V Ground is available on J14 and J38 headers marked as GND TestPoint POWER C13 24 100n D1 LL4148 U3 VIN SPX2920M3 3 3 VOUT C24 C25 10u 16V 10u 16V GND SINDERNIS GND Figure2 Implementation of the power supply on the E ion Solution with USB 5V jumper allows drawing up to 100mA from USB bus To draw higher current up to 500mA accordingly to USB 1 1 or 2 0 specifications power switch should be used Software should turn on this power switch after successful enumeration Example of power switch is shown b
16. ck Stereo JACK 3 5mm IDC 20 28 Technical Assistance For technical support please contact support propox com When requesting technical support please include following information Version number of EVBmm Complete target device minimodule part number Programming voltage Jumper settings A detailed description of the problem Example Application Examples programs are available on www propox com site ion 20 Accessories Below is a list of the available categories of accessories for the board Perypherial cables Minimodules with FPGA AVR and ARM devices ARMcablel programmer 9V 750mA 230VAC power supply 1 WIRE 051820 thermometer Warranty Statement EVBmm warranty is for six month Repair will be completed at no cost to user if user has not caused failure User is responsible for shipment charges Limitation and Liability Although all the information contained herein have been carefully verified Propox assumes no responsibility for errors that might appears in this document or for damage to things or persons resulting from technical errors omission and improper use of this guide and of the related software and hardware 30 ion PU gor 12 gor SD MMC e e N tc 33V R26 DOR 23308 73308 pus pis e Anger
17. connector SD MMC slot Alphanumeric LCD connector Graphic LCD connector for 128x64 display 1 2 Minimodules supported by EVBmm Evaluation system EVBmm supported Flexibility technology and allow You to create and verify projects based minimodules which can be fitted to mm connector List supported Propox minimodules MMstr912 MMnet105 MMstr75xFR MMmega02 e MMstr71xF MMmega00 01 MMstm32F103R e MMfpgat2 MMsam7s MMfpgad2 e MMsam7x ADPopldO1 e MMlpc213x Construction of system evaluation EVBmm allowed to implementation FPGA minimodules based on Xilinx Spartan3 MMfpga02 MMfpga12 devices and selective minimodules MMnet series W projekcie systemu In project EVBmm board we have took into consideration support our future minimodules List of currently supported minimodules is available on site www propox com ion Getting started Board EVBmm along with minimodules and accessories make a complete designing system and starting set for a wide range of modules The system was optimized to cooperate with family minimodules by Propox 2 1 Component layout EVBmm system based on socket was designed for clear access to pins of socket and peripheral devices All connections with peripherals are connected using peripheral cables available in Propox shop named kab EVBxxx 5 X l Em um 0000000000 27
18. elow it is not implemented on the board VCC USB 45V USB 100nF lt USB PWR E Figure 3 Optional USB power switch 3 2 socket for minimodules Evaluation board EVBmm was equipped with sockets field allows insert minimodule and connect peripheries It solution was named connector Field was divided into two parts On the right side is placed two rows 40 pins socket with the marked rows as C and D Corresponded them header goldpin placed on the right side Figure 4 too marked as C and D On the left side is placed 12 rows 40 pins socket with the marked rows as Corresponded them header goldpin placed on the left side Figure 4 marked as A and B Socket mm is kind of connection matrix where pin 1A on the socket corresponded 1A pin on the header goldpin Analogue 1B on the mm corresponded 1B on header 5C 5C 2D 2D etc Figure 4 Minimodules sockets Minimodule installed socket to beware so that goldpin connector placed close to right edge of minimodule insert into socket marked as CD Other goldpin connector right side of minimodule fit into dependent of width minimodule socket marked AB or BA Access to pins is possible trough headers placed close socket Figure 5 ion 8 P M 9 heb HL 2h 2b 36 prt ooi 5 Bi
19. ire to any microcontroller pin that can generate PWM through RC low pass filter which can be built on prototype area Similarly LCD backlight can be permanently turned on by closing jumper or can be controlled by any microcontroller pin Because LCD connector contains only higher part of display bus it has to work 4 bit mode Also RW line is permanently connected to ground what allows only read operation but it is sufficient to proper operation Such approach minimizes required microcontroller port pins to six 5 GND 5V e 3 100n m GND ON gt gt LGT RIO A AN oo e A t2 GND Figure 22 Default ALCD configuration backlight permanently turned on contrast regulated with ALCD CTR potentiometer 18 ion 3 14 Graphic display GLCD The board has place for LCD graphic display LCD AG 128064H YIY Y G other indication LCD AG 128064H BHW W B E6 or LCD A 128064D1 A201 Y G with KS0108 compatible controller and 128x64 pix resolution All lines are available at the pin header GLCD CS1 CS2 Chip Select memory bank select for left right screen part RST reset line read write data line if RAV 1 data can be read with memory display by microcontroller if 0 data can be write to display by microcontroller
20. is interface are among others step operation full speed operation hardware and software breakpoints inspection and modification of contents of registers and data memories FEE 16 ion SRI PRIN RILR fk Figure 19 Implementation of JTAG interface board has standard 20 pin connector J9 Wiggler standard allowing operation with all JTAG debuggers Its signal are led to JP8 goldpin connector marked as Vref VCC nTRST GND TDI GHD TMS GND TCK GND RTCK nSRST GHD DBGRO GND DBGACK GHD GND Ground JTAG nTRST TDI TMS TCK RTCK TDO nSRST DBGRG GND Many ideas one solution PIN DESRIPTION Supply voltage to the emulator Vref Target voltage sense TRST RESET RESET signal for JTAG chain TDI Test Data Input TMS Test Mode Select TCK Test Clock TDO Test Data Output SRST Target RESET DBGRQ Debug Request DBGACK Debug Acknow Figure 20 JTAG Interface 17 3 13 Alphanumeric LCD display The board EVBmm has place for standard 2x16 characters LCD display with HD44780 compatible controller Display terminals D4 D7 RS E contrast and backlight are led to LCD connector J11 ALCD LCD connector is designed in this way that it is possible to connect contrast signal to onboard potentiometer ALCD with use of jumpers or with use of w
21. nect signal to ports minimodules CAN communication does not work properly Signals CAN RxD and TxD are not connect to minimodules port Connect signal to ports minimodules CAN line end s is not terminated Set jumpers to TERM header ALCD does not work properly Wrong connection of ALCD GLCD signals to ports Check configuration Wrong contrast voltage Check Contrast voltage on display The JTAG device cannot be programmed JTAG cable connect wrong Check cable Minimodules placed wrong Check minimodules Wrong supply power Check power supply on minimodules ion 27 Technical Data System unit Dimensions board Weight Operating Conditions VCC supply voltage DC VDO VCC supply voltage AC VAC Max Current POWER lvcc Voltage 3 3 Max current 3 3V Voltage 5 Max current 5v Connectors Power Connector UART Connector RS232 USB Device Connector USB Host Connector CAN Connector AUDIO connectors JTAG connector ion without connectors 187mm x 124mm with connectors 190mm x 132mm c a 200g 9 15V DC 7 12V 1 5 VDC 9V 7V 1 VDC 12V or 700mA VDC 15V or 12V 3 3V DC 0 4 A but not greater then 5V DC 1 A but not greater then Ivcc 5 7mm x 2 1mm 9 D SUB female USB B female 2x USB A female 3 screws terminal blo
22. ore information about the configuration and function Audio Codec can be found in TLV320AIC23 datasheet WARNING CODEC can operated only with 3 3V logic levels A CODEC not tolerant voltage levels above 3 3V 22 ion Header and connectors 4 1 Connectors LED s amp Switches Header LEDn AANO ArANO No LEDO 7 LEDs SWO 7 Switches ALCD Character Display Header ALCD CTR Uc RS E D4 D5 06 07 LG 50 LCD contrast line VC contrast potentiometer output voltage RS control line LCD data command E strobe line LCD DB4 DB5 DB6 DB7 data line LGT Backlight Display pin control for ALCD and GLCD 5V voltage out 5V GLCD Character Display Header GLCD DBO 081 082 083 084 085 086 CS1 CS2 7RST R W RS E DBO DB7 data line CS1 CS2 bank select for left right screen part RST reset line GLCD R W read write data line RS data instruction select line E display enable line strobe line 23 ion CAN Header Tx data input T Rx data output L for CAN 0606 CANH sigal for CAN GND masa ISC Header MISC ADJO ADJO potentiometer output ADJO 031 ADJ1 ADJ1 potentiometer output BU22 9 1 W BUZZ buzzer control 1 W 1 Wire output pin SD MMC Data Flash header cs elnosr MOSI
23. s on pull up what is interpreted by USB host as connection of USB device 3 9 USB Host Interface Board has double USB Host connector which allows connection external USB devices to microcontroller equipped in Host Controller 140 HOST USB USB HOST 2811821883684 15k 15k 15k 15k GNDGNDGND GND GND Figure 16 Implementation of USB Host connector Signals T_D T D for upper connector and B_D i B D for lower connector are led to goldpin connector marked as HOST USB 3 10 RS 232 interfaces The has two 85232 ports with DB 9 connector TxD RxD RTS and CTS lines are led to goldpin connector RS232 x through ST3232B transceiver Signal DSR and DTR are shorted 5232 signals can also be connected to any microcontroller s pins with use of wires Drawing below shows implementation of RS232 ports LEDs indicated data transfer ion 14 T3 3V 3 3 3 3 3 3 pm R29 R30 R31 32 220R 220R 3308 330R C36 100n D16 117 Di D19 3 3V U2 16 secs 1 FF vee 1 1 1000 100 T 5 ay m ON EET e 1 N 1 L L Lus MAX3232CSE 100n GND GND 3 3V 3 3V 3 3V 3 3 R25 4826 im 28 3 3V 220R 220R 330R 330R 16 1 100
Download Pdf Manuals
Related Search