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1. 4 11 4244 Caution for Using Handshaking 2 4 11 TEP ECHNICA CO LTD T FACS MKY37 User s Manual Chapter 5 Ratings 51 Electrical Ratings e 5 8 52 uuu sicario cn tecate 5 4 5 2 1 Clock and Reset Timing ZRST Xi 5 4 5 2 2 Baud Rate Timing TXD 5 5 5 2 3 Strobe l O Pin Timing Do0 to Do15 5 1 010 to 0115 STB2 CLR 5 6 5 3 Package Dimensions cuia a a 5 7 5 4 Recommended Soldering Conditions 5 8 5 5 Recommended Reflow Condiltlions u 5 8 Appendix Appendix 1 Schematic Diagram of MKY37 Function App 2 Appendix 2 Model Diagram for Cascade Connection App 4 vi TEP MKY37 User s Manual DTECHNICA SHE Figures 2 EL nod Scr 1 3 Fig 2 1 MKY37 Pin Assignment J T 2 3 Fig 2 2 Pin Electrical Characteristics in I O Circuit Types of MKY37 2 6 Fig 3 1 Hardware Reset sicicisicccscisosecciescsstecsssasecuivastecsiv
2. 3 6 3 4 2 Recommended Network Connection u 3 7 3 5 AO A AO 3 8 3 6 16 Output Pins Do 3 9 3 7 Connection Example of MKY37 Basic Functions 3 10 Chapter4 Expanded Functions of MKY37 4 1 Scan Response Signals and Its 4 3 4 1 1 Function of 3MON PA 4 3 4 1 2 Indication of Scan Response rre 4 4 4 1 3 Watehdog Timers u planas 4 4 4 1 4 CER Pin F nctlon u tinte 4 5 42 Setting Strobe Signal and Its Application 4 6 4 21 STB1 Pin F nction nani eric cdc iii 4 6 4 2 2 Time to Sample State of DiO 0115 Pins STB2 Pin 4 6 4 2 3 Setting Strobe Signal Timing SSA Pin 4 7 4 24 Enabling Disabling Handshake SSB Pin eese 4 8 4 2 41 Example of Handshaking Effectiveness 4 9 4 2 4 2 Cautions for Sending Character String Data 4 10 4 2 4 3 Caution for Using Handshaking 1
3. TEP S TECHNICA Co LTD Hi speed Link System Satellite IC MK Y3 7 User s Manual Note 1 The information in this document is subject to change without prior notice Before using this product please confirm that this is the latest version of this document 2 Technical information in this document such as explanations and circuit examples are refer ences for this product When actually using this product always fully evaluate the entire sys tem according to the design purpose based on considerations of peripheral circuits and the PC board environment We assume no responsibility for any incompatibility between this product and your system 3 We assume no responsibility whatsoever for any losses or damages arising from the use of the information products and circuits in this document or for infringement of patents and any other rights of a third party 4 When using this product and the information and circuits in this document we do not guaran tee the right to use any property rights intellectual property rights and any other rights of a third party 5 This product is not designed for use in critical applications such as life support systems Con tact us when considering such applications 6 No part of this document may be copied or reproduced in any form or by any means without prior written permission from StepTechnica Co Ltd TEP MKY37 User s Manual S TECHNICA Co LTD Pref
4. Fig 3 2 Recommended Network Connection The High level signal output from the TXE pin pin 42 of the network interface can be AO used to detect that the center IC is scanning It can also be used to check the operation of the user system using the HLS and measure the response speed Background information to help build network cables is described in Hi speed Link Sys tem Technical Guide For more information about how to select components or to get recommended components visit our Web site at www steptechnica com TEP STE HNICA CO LTD MKY37 User s Manual 3 5 16 Input Pins Di The MKY37 has 16 input pins DiO to 0115 The state of the input pins is copied directly to the memory address corresponding to the SA in the Di area in the center IC DiO pin 10 corresponds to data bit and Di15 pin 27 corresponds to data bit 15 which link as 16 bit word data to memory in the center IC This 16 input pins have Schmitt type input buffers and can be connected directly to time constant circuits for chat tering prevention The MKY 37 samples the state of the 16 input pins when a command issued from the center IC is 0 or 8 When other commands 1 to 7 and 9 to 14 are issued the MKY37 does not sample the state of their input pins and data stored in response packet is fixed at 0000H Table 3 2 shows correspondence of commands issued from the center IC Table 3 2 Correspondence of Commands Issued from Center
5. i When the HLS operates in half duplex mode the signal output from the TXD pin of the a NIE MKY37 may be input directly to pin while the MKY37 is returning the RP The MKY37 is designed not to input data when the TXE pin is High so there is no problem TEP S ECHNICA CO LTD Chapter 3 Connecting Bacsic Functions of MKY37 T co 3 4 2 Recommended Network Connection Figure 3 2 shows the recommended network connection The TRX driver receiver components consists of an RS485 based driver receiver LSI driven at 5 0 V and pulse transformer Recommended network cables include Ethernet LAN network cables IOBASE T Category 3 or higher and shielded network cables When operating the HLS full duplex mode requires two twisted pair cables and half duplex requires one twisted pair cable Fig 3 2 Full duplex mode MKY37 Equivalent to SN751177 ll Network cable jc ue Two twisted pair cables with impedance of 100 Q Connect a 100 Q termination resistor to the end of the network cables Connecting the resistor before or after the pulse transformer has the same effect V Half duplex mode MKY37 Equivalent to ADM1485 One twisted pair cable with impedance of 100 Pulse transformer Network cable Connect a 100 Q termination resistor to the end of the network cables Connecting the resistor before or after the pulse transformer has the same effect
6. IC Command Function of MKY37 Data stored in response packet Memory Center IC 0 OH Samples DiO to 0115 pin states State of Di0 to Di15 pins Di Does not sample STB2 not output 8 8H Samples DiO to 0115 pin states State of Di0 to Di15 pins Di 1 1H to 7 7H 0000H C1 to C7 Does not sample STB2 not output 0000 C1 to C7 9 9H to 14 EH Caution If any I O input pins among 16 input pins of MKY37 are unused in the user system they cannot be left open Fix them at High or Low pins to be used for future should be con nected to a pull up or pull down resistor When a command in the command packet CP issued from the center IC is not 0 or 8 basic function specified data of 16 input pins is not sent to the Di area TEP Chapter 3 Connecting Bacsic Functions of MKY37 3 6 16 Output Pins Do The MKY37 has 16 output pins Do0 to Do15 When the MK Y37 inputs the CP correctly which contains one piece of the data in the Do area in the center IC memory issued from the center IC and when the address of the CP matches the SA set by IAO to IAS the MK Y37 outputs updates the data contained in the CP to the output pins Do0 to Do15 of the MK Y37 The data output to the I O output pins is kept until next updated The pin 56 corresponds to bit 0 of the 16 bit word data in the Do area in the center IC mem ory and Do15 pin 9 to bi
7. STE HNICA CO LTD MKY37 User s Manual 1 2 Procedure for Operating MKY37 The MKY37 is a passive IC and it is operated by remote control from center ICs The user system program for access to center ICs to use the MKY37 is very simple 1 The user system program just writes data to memory in the center IC when it wants to change the sta tus of the output pin Do of the MKY37 For example when a relay is connected to the output pin Do the user system program simply writes data to memory in the center IC only when it wants to turn the relay on or off 2 The user system program simply reads memory in the center IC when it wants to obtain the status of the input pin Di of the MKY37 For example when a sensor is connected to the input pin Di the user system program can obtain the status of the sensor by reading memory in the center IC 3 The user system program can operate the MK Y37 s expanded functions simply by handling com mand in memory in the center IC 1 3 MKY37 Response Time In the HLS where a center IC continues to scan constancy of response time and real timeness are assured The time required to link data in memory in the center IC with the states of the input pin Di and output pin Do of the MK Y37 essentially matches the scan time of the HLS which is very short For example in a user system that must detect the exact position of each box on a belt conveyor if four MKY37s are connected to the center IC
8. more clocks of the Xi pin frequency right after power on or when resetting hard ware intentionally IA0 to IA5 34 to 39 Positive Input pins to assign satellite addresses Set the positive logic hexadecimal values 1 to 63 01H to 3FH assuming a High level to be 1 A5 is MSB Positive Output pin that outputs High level pulse of strobe signals indicating timing to update state of general purpose out put pins Do0 to Do15 when command packet is input correctly from center IC Positive Output pin that outputs High level pulse of strobe signals indicating timing to read state of general purpose input pins Di0 to Di15 Positive Output pin that goes High while outputting response packet to center IC Connect this pin to the enable input pin of a driver Positive Pin that outputs response packet to center IC Connect this pin to the drive input pin of a driver Positive Input pin that inputs command packet from center IC Connect this pin to the output pin of a receiver Positive Be sure to connect this pin to GND manufacturer test pin Positive Pin for connection of generated clock Positive Input pin that selects baud rate of MK Y37 For details see 3 1 2 Setting Baud Rate Positive Input pin that selects baud rate of MK Y37 For details see 3 1 2 Setting Baud Rate Positive Input a High or Low level for selection of strobe signal functio
9. pins DiO to Dil5 The MKY37 outputs a pulse like strobe signal from the STB2 STroBe 2 pin pin 41 to indicate the time to sample the state of the input pin Di The state of the input pin Di is sampled at the center of the strobe signal Soe i When the SSB Strobe Select B pin described in 4 2 4 Enabling Disabling Hand shake SSB Pin is Low no strobe signal may be output from the STB2 pin when the MKY37 returns the RP TEP Chapter 4 Expanded Functions of MKY37 ST ECHNICA CO LTD 4 2 3 Setting Strobe Signal Timing SSA Pin The following two requests occur in the user system using the HLS 1 To update state of output pin Do after sampling input state of input pin Di 2 To sample state of input pin Di after updating state of output pin Do In the MKY37 the user can select the timing of strobe signals output from the STB1 pin and STB2 pin by setting the SSA Strobe Select A pin pin 52 This will enable to meet the two requests The MKY37 per forms the operation in 1 above when the SSA pin is set Low and the operation in 2 above when the SSA pin is set High Fig 4 4 N Setting for input immediately Setting for input immediately before updating output state after updating output state MKY37 MKY37 STB2 STB2 STB1 STB1 SSA SSA Do0 Do15 Do0 D015 STB1 STB2 identical in with to STB1 STB2 STB2 Passage of time Passage of time Input is sampled aft
10. shot multivibrator circuit in the MKY37 1 The MON pin goes High when hardware reset becomes activated 2 And then when the MON pin receives correctly a command packet self addressed CP from the center IC transmitted to the terminal matching SA Satellite Address that was set using IA0 to IA5 pins it goes Low 3 After that when the MON pin cannot receive self addressed CP within a given time it goes High The given time means 130560 x TBPS Table 4 1 lists the given time for the baud rate Table 4 1 Given Time for MON Pin to Change to High Baud rate Given time 12 Mbps 10 88 ms 6 Mbps 21 76 ms 3 Mbps 43 52 ms 1 5 Mbps 87 04 ms i In auser system using output signals from the MON pin as time up signals for a watchdog timer set the time shown in Table4 1 as the time up TEP STE HNICA CO LTD MKY37 User s Manual 4 1 2 Indication of Scan Response When the LED that goes on at a Low level is con nected to the MON pin pin 28 it indicates that the MKY37 has responded to a scanning from the center IC The MON pin has a drive capacity of 8 mA If the LED can go on even at 8 mA or less the connec 560 Q Approx 8 mA 5 0 V tion in Figure 4 1 is possible In this case the hard ware designer of the terminal with the MKY37 needs Gregi LED to determine the current limiting resistor value according to the LED rating Fig 4 4 Indication of Scan Respons
11. Appendix MKY37 User s Manual Appendix 1 Schematic Diagram of MKY37 Function 16 bit general purpose input TTL level Schmitt type input 16 bit general purpose output Push pull output Driven at 8 mA max fa Kept Low from power on till completion of first receiving Set satellite address Hi level 1 Lo level 0 Set according to binary code 01H to 3FH J Satellite IC MKY37 When driving clock is 48 MHz BPS0 BPS1 Baud rate Hi Hi 12 Mbps Lo Hi 6 Mbps Hi Lo 3 Mpbs Lo Lo 1 5 Mbps 4 7 45 Connect TEST pin to GND Connect termination resistor to end of network cable Full duplex Equivalent to SN751177 Pulse transformer Equivalent to ADM1485 Network cable Pulse transformer en Driving clock Supply frequency of four times baud rate Example 48 MHz for 12 Mbps Baud rate is set using BPSO and 51 pins Oscillator 1 Out VDD GND 30 VDD 5 Out GND Voltage detection reset IC peo Monitor LED that monitors yy scan response state of MKY37 5600 Green 17 Insert bypass capacitor 16 such as laminated ceramic capacitor of about 0 1 uF between power pins 117 64 4 7 App 2 Appendix TEP S TECHNICA Co LTD Strobe indicating when to update 16 bit Do Do is updated at the pulse central timing Generated at every scan from center IC Previous Do data New Do data Pulse
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13. Di0 to Di15 The user can design peripheral circuits based on each update timing 4 Can set handshake to ensure link with center IC EP T STE HNICA CO LTD MKY37 User s Manual Chapter2 MKY37 Hardware This chapter describes the MK Y37 hardware such as pin assignment pin functions and circuit types TEP Chapter 2 MKY37 Hardware ST ECHNICA CO LTD Chapter 2 MKY37 Hardware This chapter describes the MK Y37 hardware such as pin assignment pin functions and I O circuit types Figure 2 1 shows the MK Y37 pin assignment MKY37 64 pins TQFP VDD VDD BPSO VDD BPS1 RST SSA CLR SSB MON GND Di15 GND Di14 Do0 Di13 Do1 Di12 Do2 Di11 Do3 Di10 Do4 Di9 Do5 Di8 Do6 Di7 Do7 Di6 VDD VDD Note Pins prefixed with are negative logic active Low Fig 2 1 MKY37 Pin Assignment TEP S TECHNICA CO LTD Table 2 1 lists the pin functions of the MKY37 Do0 to Do15 56 to 63 2to 9 MKY37 User s Manual Table 2 1 Pin Functions of MKY37 Positive 16 bit general purpose output pins Di0 to Di15 10to 15 18 to 27 Positive 16 bit general purpose input pins 28 Negative Output pin that outputs scan response state of MK Y37 Low level is output when a correct scan response is made Positive Input pin to forcibly set all output pins Do0 to Do15 Low Usually keep this pin Low Negative MKY37 Hardware reset input pin Keep this pin Low for 10 or
14. O HO MKY37 User s Manual Tables Table 2 1 Pin Functions of MKY937 ie u 2 4 Table 2 2 Electrical Ratings of 7 1 1 1 1 00111 u u J J 2 6 Table 3 1 Baud Rate at 48 MHz of Driving 3 3 Table 3 2 Correspondence of Commands Issued from Center 3 8 Table 4 1 Given Time for MON Pin to Change to High 4 3 Table 5 1 Absolute Maximum 95 u u 5 3 Table 5 2 Electrical Ratings coii estan crx u uu u uu das 5 3 Table 5 3 Characteristics Measurement 5 4 viii Chapter1 Outline of MKY37 This chapter describes the outline of the MKY37 in the Hi speed Link System HLS dal RoleofMKY37 ci 1 3 1 2 Procedure for Operating MKY37 1 4 1 3 MKY37 Response Tim e 1 4 1 4 Features of MKY37 1 5 TEP Chapter 1 Outline of MKY37 S TECHN ICA CO LTD Chapter 1 Outline of MKY37 This chapter describes the outline of the MKY37 in the Hi speed Lin
15. Standard English is a trademark of Win Corporation ii EP T STE HNICA CO LTD MKY37 User s Manual TEP S TECHNICA Co LTD MK Y37 User s Manual CONTENTS Chapter1 Outline of MKY37 14 of MK Y I7 u nana 1 3 1 2 Procedure for Operating MKY937 u u 1 4 1 3 MKY37 Response TIT enda tace cc abusi tas E dere en J J 1 4 1 4 Features id 1 5 1 4 1 Features of Basic Functions of MKY37 as Satellite IC in HLS 1 5 1 4 2 F rictions E 1 5 Chapter 2 Hardware J J J 2 3 Chapter 3 Connecting Basic Functions of MKY37 Driving GIOCK niin id O NI 3 3 3 1 1 Supplying Generated Driving Clock 3 3 3 1 2 Setting Baud Rate cocina cee sacetestecececcoesteusteoncuecassceeseateds 3 3 3 2 Hardware RESCUE 3 4 3 3 Setting Satellite Addresses 3 5 3 4 Connecting Network Interface 3 6 3 41 Details of and TXD Pins J l
16. ace This manual describes the MKY37 or a kind of satellite IC in the Hi speed Link System Be sure to read Hi speed Link System Introduction Guide before understanding this manual and the MKY37 In this manual the Hi speed Link System is abbreviated as HLS Target Readers This manual is for Those who first build an HLS Those who first use StepTechnica s various ICs to build an HLS e Prerequisites This manual assumes that you are familiar with Network technology Semiconductor products especially microcontrollers and memory e Related Manuals Hi speed Link System Introduction Guide Hi speed Link System Technical Guide Caution To users with Hi speed Link System User s Manual released before March 2001 Some terms in this manual have been changed to conform to International Standards Some terms in this manual are different from those used on our website and in our product bro chures The brochure uses ordinary terms to help many people in various industries understand our products Please understand technical information on HLS Family and CUnet Family based on technical documents manuals B This manual has been prepared based on Standard English M meeting the requirements of the International Organization for Standardization ISO and the American National Standards Institute ANSI This English manual is consistent with the Japanese document STD HLS37 V1 3J
17. and position detection sensors are connected to the input pins Di of all MK Y37s the status of 64 sensors 16 sensors x 4 MK Y37s is stored to memory in the center IC with a scan time interval of 60 7 us 12 Mbps full duplex keeping data up to date This speed remains unchanged even if the farthest MK Y37 is 100 m distant Even if the position detection sensors are placed at every 5 cm they can detect the position of every box on the belt conveyor without mistakes even when the conveyor runs at 823 m s gt 2900 km h Reference For details of the scan time refer to Scan Time in User s Manual for the center IC MELDE d connecting the MKY37 TEP Chapter 1 Outline of MKY37 S TECHNICA CO LTD 1 4 Features of MKY37 This section describes the basic and the expanded functions of the MKY37 1 4 1 Features of Basic Functions of MKY37 as Satellite IC in HLS 1 Has 16 input pins Di0 to Di15 and 16 output pins Do0 to Do15 2 Supports baud rates of 12 6 and 3 Mbps 3 Supports full and half duplex modes 4 Has six pins to set satellite addresses SA for any one of 63 terminals at 01H to 3FH 5 Operates on 5 0 V single power supply and available in 0 5 mm pitch 64 pins TQFP 1 4 2 Expanded Functions 1 Has pin that outputs scan response signals 2 Has CLR pin that sets output pins Do0 to Do15 Low 3 Has strobe output pins that indicate timing to update output pins Do0 to Do15 and receive input pins
18. at power on Fig 3 1 No response to Must be kept Low for 10 or more clock periods less than 1 clock Fig 3 1 Hardware Reset Caution Design the circuit so that a hardware reset is surely activated immediately after MKY37 power on TEP Chapter 3 Connecting Bacsic Functions of MKY37 3 3 Setting Satellite Addresses The MKY37 has six satellite address SA setting pins IAO to IA5 Input Addresses 0 to 5 Individual sat ellite addresses SA must be assigned to each satellite IC when using the HLS To set the SA values to the MKY37 use hexadecimal numbers from 01H to 3FH addresses 1 to 63 assuming a High level is input to to IAS pins 34 to 39 as 1 and Low level 15 input as 0 The most significant bit is IA5 pin 39 These SA settings correspond to the memory addresses in each area in the center IC Example 1 The state of the input pin Di of the MKY37 at SA 1 01H is stored at address 02H in the Di area of memory in the center IC e Example 2 The state of the input pin Di of the MKY37 at SA 63 3FH is stored at address 7 in the Di area of memory in the center IC Example 3 The data at memory address 9CH in the Do area in the center IC is output to the output pin Do of the MKY37 at SA 14 0EH There are no limitations on physical network arrangement such as setting the SA values in the order in which th
19. e StepTechnica recommends a green LED indicating stability be connected to the MON pin When not used leave this pin open 4 1 3 Watchdog Timer The function of the MON pin changing from Low to High after the given time has elapsed time up can be used as a watchdog timer for the terminal with the MK Y37 embedded Generally the time up time of a watchdog timer needs to be set longer than the allowable time of multiple scan times However the time up time of the MON may be inappropriate in the following cases 1 For the user system where HUBs are inserted into network One scan time increases according to the inserted number of HUBs 2 When user program operating center IC pauses scanning 3 When user program operating center IC uses single scan and starts single scan according to inappro priate timing for time up time of watchdog timer 4 When user program operating center IC stops scanning intentionally The user should determine whether the time up time of the MON pin is appropriate for the user system Ref For details of the scan time scan pausing and single scan refer to User s Manual for Reference Monete the center IC that the MKY37 is connected to TEP Chapter 4 Expanded Functions of MKY37 ST ECHNICA CO LTD 4 1 4 CLR Pin Function The MKY37 has a CLR CLeaR pin pin 29 that forcibly sets the output pins Do0 to Do15 Low When a High level is input to the CLR pin all the
20. er TIE from rising edge of STB2 signal Fig 4 4 SSA Pin Setting and Update Timing TEP STE HNICA CO LTD MKY37 User s Manual 4 2 4 Enabling Disabling Handshake SSB Pin Handshaking with the center IC can be enabled or disabled by setting the SSB Strobe Sdect B pin pin 53 When the SSB pin is Low handshaking with the center IC is enabled When the MKY37 inputs the command packet CP from the center IC it recognizes whether the center IC has received correctly the response packet RP returned to the center IC at the last scan In a case where handshaking is enabled the MKY37 outputs a strobe signal from the STB2 pin to sample the state of the input pin Di only when the center IC has input the previously returned RP correctly and the sampled state of the input pin Di is embedded in the RP If the center IC has not input the previously returned RP correctly the MKY37 neither outputs a strobe sig nal to the STB2 pin nor samples the state of the input pin Di In this case the previously sampled stated of the input pin Di is embedded in the RP again Figure 4 5 shows the timing of generating the STB2 strobe signal in the MKY37 with five satellites and SA 2 in half duplex mode N Since Do data is added to all commands Passage of time the Do output pin of the MKY37 is updated at every scan In a case where handshaking is set if this response does not arrive at the center IC the next STB2 signal is
21. executes commands other than 0 or 8 basic function specified for the MKY37 no strobe signal is output from the STB2 pin EP T STE HNICA CO LTD MKY37 User s Manual Chapter5 Ratings This chapter describes the ratings of the MKY37 5 1 5 2 5 3 5 4 5 5 Electrical Ratings 5 3 AC Characteristics ceca ce acc oo a FR poU opa Uca nana sur E exp 5 4 Package Dimensions Q 5 7 Recommended Soldering Conditions 5 8 Recommended Reflow Conditions 5 8 Chapter 5 Ratings TEP S TECHNICA Co LTD Chapter 5 Ratings This chapter describes the ratings of the MK Y37 5 1 Electrical Ratings Table 5 1 lists the absolute maximum ratings of the MKY37 Table 5 1 Absolute Maximum Ratings Parameter Power supply voltage 0 5 to 6 5 Vss 0 V Input voltage Vss 0 5 to VDD 0 5 Output voltage Vss 0 5 to VDD 0 5 Peak output current Peak 26 Allowable power dissipation 345 Operating temperature 40 to 85 Storage temperature Table 5 2 lists the electrical ratings of the MKY37 65 to 150 Table 5 2 Electrical Ratings Parameter Operating power supply voltage Conditions TA 25 C Vss 0V Vi VDD or Vss Xi 48 MHz output open Mean o
22. ey are closer to the center IC If the center IC has two input pins RXD1 and RXD2 there are no rules such as which pin network the MKY37 in which specific SA values are set is connected to Caution The different SA values must be set to all satellite ICs connected to one center IC The SA value cannot be set to 00H Even if the SA value of 00H is set to a satellite IC by mistake the system is not adversely affected but the satellite IC is not scanned by the center IC TEP STE HNICA CO LTD MKY37 User s Manual 3 4 Connecting Network Interface The network interface network I F pins of the MKY37 consist of RXD pin 44 TXE pin 42 and TXD pin 43 3 4 1 Details of RXD TXE and TXD Pins In the MKY37 the RXD pin inputs a command packet CP from the center IC Connect the TRX driver receiver components in the network so that a serial pattern signal for the command packet CP transmitted from the center IC will be input to the RXD pin If the address of the input CP matches the SA set by IAO to IAS the MK Y37 immediately returns a response packet RP to the center IC The TXE pin goes High while the MKY37 sends the RP When the TXE pin goes High design the TRX so that the enable pin of the TRX driver is activated thereby enabling the serial pattern signal for the RP output from the TXD pin to be transmitted to the network When the hardware reset is activated the TXE and TXD pins go Low level immediately
23. iacsnthesoiescasecansstsasaciecadeessseersveaien 3 4 Fig 3 2 Recommended Network Connection 3 7 Fig 3 3 Connection Example of Basic Functions 3 10 Fig 4 1 Indication of Scan Response u 4 4 Fig 4 2 Connection Example between MON Pin and CLR 4 5 Fig 4 3 Update Timing of Output Pin Do 4 6 Fig 4 4 SSA Pin Setting and Update Timing 4 7 Fig 4 5 Timing of STB2 Strobe Signal 4 8 Fig 4 6A Operation with No Failure U U U u uuu uuu uuu uu u 4 9 Fig 4 6 Handshaking Disabled l u u u 4 9 Fig 4 6C Handshaking Enabled U u uu uu uuu u 4 9 Fig 4 7 Sending with Character Counter Used 4 10 Fig 4 8 Operation at CP Failure 4 11 Fig Appendix 1 Schematic Diagram of MKY37 Function App 2 Fig Appendix 2 Model Diagram for Cascade Connection App 4 vii TEP STE C
24. k System HLS 1 1 Role of MKY37 MKY37 is a kind of satellite IC that constitutes the HLS Be sure to read the Hi speed Link System Introduction Guide before understanding the MKY37 and this manual The MKY37 must be assigned individual satellite addresses SAs The MKY37 returns a response packet RP in response to a command packet CP which matches a SA from the center IC This causes the status of the input pin Di of the MKY37 to be copied directly to the Di area of memory in the center IC The CP issued from the center IC is embedded with one data item arranged in the Do area of memory in the center IC The MKY37 outputs data in the CP from the output pin Do of the MKY37 each time a CP matching a SA is input The center IC periodically transmits and receives a CP to continue scanning the satellite IC This series of continuous operation links the status of the input pin Di of the MKY37 with data in the Di area of memory in the center IC and data arranged in the Do area of memory in the center IC with the status of the output pin Do of the MKY37 The Di and Do areas of memory in the center IC are arranged corresponding to each SA that must be set to the MKY37 Fig 1 1 The MKY37 has some expanded functions in addition to input pin Di and output pin Do for embedding in various user systems Center IC memory Bit 15 ssssssssssssss 0 Network Do area Di area MKY37 Fig 1 1 Role of MKY37 TEP
25. llator Driving clock 47 Supply frequency 41 Out VDD of four times baud rate GND Example 48 MHz for 12 Mbps Baud rate is set using BPSO and BPS1 pins 31 30 55 VDD Out ND Voltage detection reset IC 117 28 7 32 5600 Green 33 17 Insert bypass capacitor 017 16 such as laminated ceramic capacitor 49 of about 0 1 uF between power pins 48 117 777 45 64 1 i Connect TEST pin to GND P274 274 Fig 3 3 Connection Example of Basic Functions Chapter4 Expanded Functions of MKY37 This chapter describes the pin functions and connections required to operate the expanded functions of the MKY37 4 1 Scan Response Signals and Its Applications 4 3 4 2 Setting Strobe Signal and Its Application 4 6 TEP Chapter 4 Expanded Functions of MKY37 ST ECHNICA CO LTD Chapter4 Expanded Functions of MKY37 This chapter describes the pin functions and connections required to operate the expanded functions of the MKY37 4 1 Scan Response Signals and Its Applications This section describes how to use the following two functions among the expanded functions described in 1 4 2 Expanded Functions 1 Has pin that outputs scan response signals 2 Has CLR pin that sets output pins Do0 to Do15 Low 4 1 1 Function of MON Pin The MKY37 has a MON pin pin 28 that outputs scan response signals The MON pin operates as follows by a retriggerable one
26. n be recognized by a nonre sponding flag bit in the control word in the center IC 3 If the above error occurs ideally 1t should be handled by the algorithm that does not read data How ever since scanning is very fast and such handling must be set for each satellite IC program execu tion speed may not follow scan speed Based on the above cautions a method for easily creating the program algorithm for the center IC is shown below The input pin Di consists of 16 pins If eight pins are used to input a character code 8 bit information eight pins are left When a character counter is used for these eight input pins Di the program algorithm for the center IC can be created easily Figure 4 7 shows a example of using the high order one byte 8 bits of data as a character counter Center Satellite Command STB2 1 A Response ASA STB2 2 B 2 B STB2 2 B a 3 C Character counter is 2 which means data is previous one before updating STB2 is not generated C is retried automatically VA Ve AYAN 3 STB2 4 D 4 D STB2 5 E 7 Fig 4 7 Sending with Character Counter Used TEP Chapter 4 Expanded Functions of MKY37 ST ECHNICA CO LTD 4 2 4 3 Caution for Using Handshaking 1 In the HLS the handshaking function is intended to send data sampled by the satellite IC to the center IC without loss This will cause a difference in da
27. n input Schmitt trigger for TTL level input AVt min max liL ViL Vss max Fig 2 2 Pin Electrical Characteristics in Circuit Types of MKY37 Chapter 3 Connecting Basic Functions of MKY37 This chapter describes the pin functions and connections required to operate the basic functions of the MKY37 3 1 3 2 3 3 3 4 3 5 3 6 3 7 Driving ClOCK em 3 3 Hardware 2 222222 cc cti td 3 4 Setting Satellite Addresses 3 5 Connecting Network 3 6 16 input Pins hesmwesveccscevecs 3 8 16 Output Pins cornada 3 9 Connection Example of MKY37 Basic Functions 3 10 TEP Chapter 3 Connecting Bacsic Functions of MKY37 Chapter 3 Connecting Basic Functions of MKY37 This chapter describes the pin functions and connections required to operate the basic functions of the MKY37 3 1 Driving Clock This section describes the MK Y37 driving clock 3 1 1 Supplying Generated Driving Clock An oscillator generated external clock can be supplied directly to the MK Y37 and used as the driving clock To supply the external clock directly to the MKY37 use the Xi pin pin 47 The specifications for direct supplying the external clock are as follows 1 The upper frequency is 50 MHz and a lower freq
28. next scan even when the RP is discarded at the center IC and character will not be omitted Fig 4 6C C N Center Satellite Center Satellite Command Command EA STB2 a STB2 A A p STB2 ine STB2 Non updated data E B Ed B recognized STB2 data left STB2 B lost Error in control word STB2 Ba STB2 not generated a D E C retried automatically p STB2 STB2 E D py STB2 E E Fig 4 68 Handshaking Disabled Fig 4 6C Handshaking Enabled TEP STE HNICA CO LTD MKY37 User s Manual 4 2 4 2 Cautions for Sending Character String Data This section describes the cautions for sending character string data when handshaking is enabled with the SSB pin set Low As described previously enabling handshaking ensures that character string data is sent without omitting character to memory in the center IC In this case the user system program of the center IC must obtain character string data from memory in synchronization with scan timing For the example in Figure 4 6C note the following 1 If character string data is simply obtained from memory in synchronization with the scan timing character string data including duplicated characters like ABBCDE may be read because the third character cannot reach at the third scan 2 At the third scan the corresponding satellite IC causes an error that ca
29. not generated Fig 4 5 Timing of STB2 Strobe Signal Generation In a user system in which real timeness is essential when a sensor is connected to the input pin Di and so on disable handshaking TEP Chapter 4 Expanded Functions of MKY37 ST ECHNICA CO LTD 4 2 4 1 Example of Handshaking Effectiveness This section describes an example of the effectiveness of handshaking with the center IC Center Satellite STB2 strobe signal Fig 4 6 a character may be omitted in the character string data obtained by the center IC when D Some user systems may want to send character string data STB2 to the center IC in synchrony with the strobe signal output A recognized A sent from the STB2 pin For example when transferring char STB2 B B acter string data consisting of the 5 characters ABCDE to R E STB2 P e the input pin Di of the MKY37 at each output of the m handshaking with the center IC is disabled For example if there is interference including external noise in the network during sending the letter C and the RP is discarded at the center IC the STB2 strobe signal is output at the next scan Fig 4 0 Operation with No Feld Consequently the center IC receives the character string data ABDE C omitted Fig 4 6B In contrast when handshaking is enabled the STB2 strobe signal is not output at the
30. ns to this pin For details see 4 2 3 Setting Strobe Signal Timing Positive Input a High or Low level for selection of strobe signal functions to this pin For details see 4 2 4 Enabling Disabling Handshake Continue TEP Chapter 2 MKY37 Hardware ST ECHNICA CO LTD Table 2 1 Pin Functions of MKY37 Continued Note Pins prefixed with are negative logic active Low T Table 2 2 and Figure 2 2 shows the electrical ratings of the MK Y37 pins EP S TECHNICA Co LTD Table 2 2 Electrical Ratings of MKY37 MKY37 User s Manual Negative logic RR wo rm Jolojojo m O O CO O g O U c O O O O O O OO s w w w Vt max 2 2 V V Vt min 0 76 AVt min 0 2 V Mx Vpp max liL VL Vss max 100 Type C Pull up input 100 Schmitt trigger for TTL level input A AVt min liH ViH Vpp max liL ViL Vss max Rpu typ 50kQ Type E TTL level input VIH min 2 2 V ViL max 0 76 V max 100 liL Vss max 100 Type D Rpd typ 50kQ 100uA min Vpp 0 2 V 8mA min 37 V VoL 100uA max 0 2 VoL 8mA max 0 44 V loH max 8 mA loL max 8 mA Pull dow
31. oldering Conditions Parameter Symbol Reflow Manual soldering iron Peak temperature resin surface Tp 255 C max 380 C max Peak temperature holding time tp 10 s max 5 5 max Cauti on 1 Product storage conditions TA 40 C max RH 85 for prevention of moisture absorption 2 Manual soldering Temperature of the tip of soldering iron 380 C 5 s max Device lead temperature 260 C 10 s max package surface temperature 150 C max 3 Reflow Twice max 4 Flux Non chlorine flux should be cleaned sufficiently 5 Ultrasonic cleaning Depending on frequencies and circuit board shapes ultrasonic cleaning may cause resonance affecting lead strength 5 5 Recommended Reflow Conditions gt Package surface temperature t1 tw Time Parameter Pre heat time 60 to 80 s Pre heat temperature 150 to 190 C Temperature rise rate 1 to 4 C s Peak condition time 10 s max Peak condition temperature 255 C Cooling rate to 1 5 C s Cooling rate to 0 5 C s High temperature area 220 C 60 s max Removal temperature lt 100 C or on The recommended conditions apply to hot air reflow or infrared reflow Temperature indi cates resin surface temperature of the package Appendix Appendix1 Schematic Diagram of MKY37 Function Appendix2 Model Diagram for Cascade Connection TEP S TECHNICA Co LTD
32. perating current Vi VDD or Vss Xi 24 MHz output open External input frequency Input to Xi pin Input pin capacitance Output pin capacitance Vpp Vi 0 V f 1 MHz 25 C Rise fall time of input signal Rise fall time of input signal Schmitt trigger input The following table shows mean operating current and baud rate selected for input clock to the Xi pin Input to Xi pin Baud rate Typ Remarks Min BPS1 BPS0 3Mbps 1 5Mbps TEP STE HNICA CO LTD MKY37 User s Manual 5 2 AC Characteristics Table 5 3 lists the measurement conditions for AC characteristics of the MKY37 Table 5 3 AC Characteristics Measurement Conditions Output load capacitance Power supply voltage Temperature 5 2 1 Clock and Reset Timing RST Xi TXI Passage of time Xi 7 TXIL TRST Xi RST Clock period width Clock High level width Clock Low level width Reset enable Low level width 10 x TXI Chapter 5 Ratings TEP S TECHNICA Co LTD 5 2 2 Baud Rate Timing TXE TXD RXD TTXEH TXE RZ 1 RZ 1 RZ 0 RZ 0 RZ 1 TXD TBPS TBPS RZ 1 RZ 1 RZ 0 RZ 0 RZ 1 RXD TRNW TRNw TRWW TRWW Passage of time Short pulse width of sending signal 83 33 5 Remarks Baud rate is determined Short pulse wid
33. states of the output pins go Low In normal operation design so that a Low level is input to the CLR pin If a period in which the High level signal has been input is less than TBPS time the signal is ignored to prevent malfunctions The state of the output pins Do of the MKY37 is updated each time the command packet CP from the center IC transmitted to the terninals matching the SAs set by the IAO to IAS pins is received correctly However if scanning is stopped for reasons such as the disconnection of a network cable or center IC faults the state of the output pins Do is retained continuously When a user system cannot retain the state of the out put pin appropriately when scanning is stopped the MKY37 can use the CLR pin to forcibly clear the state of the output pins Low level Figure 4 2 560 Q Approx 8 mA shows a circuit example that clears the state of the 5 0V output pins by connecting the signal from the MON pin to the CLR pin Fig 4 2 Connection Example between MON Pin and CLR Pin Caution Read and understand the description in 4 1 3 Watchdog Timer before using this circuit example TEP STE HNICA CO LTD MKY37 User s Manual 4 2 Setting Strobe Signal and Its Application This section describes how to use the following three functions among the expanded functions described in 1 4 2 Expanded Functions 3 Has strobe output pins that indicate timing when
34. t 15 When a hardware reset is activated the output pins Do0 to Do15 go Low level immediately The output pins go Low without keeping data when High level is input to the CLR pin described in 4 1 4 CLR Pin Function Do0 to Do15 pins of the MK Y37 have a drive capacity of 8 mA max and can be connected directly to peripheral components such as transistors LEDs and photocouplers TEP STE CO LTD MKY37 User s Manual 3 7 Connection Example of MKY37 Basic Functions Figure 3 3 shows a connection example of MKY37 basic functions In the example circuit all the expanded functions described later are unused The satellite addresses of the MKY37 can be set by DIP Switch DIP sw meene 2865 etre Full duplex 16 bit general purpose input Equivalent to SN751177 Pulse transformer TTL Level ae Schmitt type input 16 bit general purpose output Push pull output Do0 Do15 Driven at 8 mA max Kept Low from power on till completion of first receiving DIP SW Equivalent to ADM1485 Network cable Pulse transformer Set 2 OO 7 satellite ZA adderess TO OTe 7 Connect termination resistor to end of network cable 52 DIP SW When driving clock is 48 MHz zol 50 BPS1 Baud rate OFF OFF 12 Mbps 29 7 7 ON OFF 6 Mbps OFF ON 3 5 ON ON 1 5 Mbps 40 Osci
35. ta arrival at the center IC between when an error occurs in the response packet and when an error occurs in the command packet An example of sending character string data is shown If an error occurs in the response packet Figs 4 6C and 4 7 the letter C does not arrive at link failure and does arrive at the next normal scan In contrast if an error occurs in the command packet Fig 4 8 the letter B arrives at the center IC twice at the scan before or after link failure 7 Center Satellite Command ae STB2 exa 1 STB2 2 B 2 B X STB2 is not generated Di is not sampled STB2 is not generated Character counter is Di is notsampled 2 which means data 2 B is retried automatically is previous one before datin ae STB2 3 3 C STB2 4 D 4 D N Fig 4 8 Operation at CP Failure As shown in this example in both cases the data sampled by the satellite IC is sent to the center IC without loss However based on the difference in data arrival at the center IC the user system program must handle data in the center IC memory Placing a character counter of at least two or more bits as described in 4 2 4 2 Cautions for Sending Character String Data near the MK Y37 can help the user system pro gram to deal with to this problem 4 2 4 4 Caution for Using Handshaking 2 When the SSB pin pin 53 is set to enable the handshaking and when the user system
36. th of 166 67 5 by inputting Xi pin and sending signal 333 33 5 setting BPSO and BPS1 pins 666 67 5 Period in which TXE pin goes High 142 x TBPS 5ns 142 x TBPS 142 x TBPS 5ns Remarks Short pulse width of input signal 0 51 x TBPS 1 0 x TBPS 1 49 x TBPS Allowable pulse width as RZ signal Long pulse width of input signal 2 0 x TBPS 1 51 x TBPS 2 49 x TBPS Allowable pulse width as RZ signal TEP STE HNICA CO LTD MKY37 User s Manual 5 2 3 Strobe l O Pin Timing Do0 to Do15 STB1 Di0 to Di15 STB2 CLR CLR TCLR Do Dots alte ToE STB1 SSA Lo TsTB STB2 TIE TDIH C 3 Tbis 2xTSTB STB2 SSA Hi 010 0115 of time High level width of strobe signal 2 x 5 5 2 x TBPS 2 x TBPS 5 Access time from STB1 0 75 x TBPS TBPS 1 25 x TBPS Do data transition time 0 20 Access time from STB2 0 75 x TBPS 1 25 x TBPS Di data setup 20 Di data hold 0 High level sensing of CLR pin 1 25 x TBPS TEP Chapter 5 Ratings S TECHNICA CO LTD 5 3 Package Dimensions MKY37 64 pin TQFP 12 0 0 2 10 0 0 1 12 0 0 2 INDEX MARK Mirror finish 0 17 0 05 0 6 0 15 Unit mm TEP STE HNICA CO LTD MKY37 User s Manual 5 4 Recommended S
37. to update output pins Do0 to Do15 and receive input pins Di0 to Dil5 The user can also design peripheral circuit based on each update timing 4 Can set handshake to ensure link with center IC 4 2 1 STB1 Pin Function Each time the MK Y37 inputs the command packet CP matching the SA from the center IC correctly it outputs data in the CP to the output pin Do of the MK Y37 The state of the output pin Do is updated at the central timing of the pulse like strobe signal from the STB1 STroBe 1 pin pin 40 Fig 4 3 The function of this STB1 pin can be used to notify a circuit connected to the output pin Do that the output state is updated i The state of the output pin Do is updated at the central timing of STB1 signal Do0 15 Previous Do data New Do data Passage of time STB1 TSTB is 2 x TBPS 333 3 ns at 6 Mbps M Fig 4 3 Update Timing of Output Pin Do Reference The pulse like strobe signal output from the STB1 pin is unaffected by the command value of the center IC The strobe signal is also output from the STB1 pin if the state of the out put pin Do after updating is identical to that before updating 4 2 2 Time to Sample State of DiO to Di15 Pins STB2 Pin If the command in the CP issued from the center IC is 0 or 8 basic function specified when the response packet RP is returned in response to the command packet CP matching the SA the MKY37 samples the 16 input
38. uency is not provided 2 Electrical characteristics of the Xi pin VIH min 2 2 V VIL max 0 76 V 3 Clock with a signal rise and fall times of 20 ns or less 4 Clock with a minimum High level or Low level time of 5 ns or more 5 Clock with jitter component of e Within 250 ps when input frequency is 25 MHz or more e Within 500 ps when input frequency is less than 25 MHz 6 Frequency accuracy of 1000 ppm 196 or better 3 1 2 Setting Baud Rate Baud rate of MKY 37 is set by setting BPSO pin pin 50 and 51 pin pin 51 Table 3 1 shows baud rate corresponding to setting of BPSO and BPS1 pins when an external clock of 48 MHz is connected to Xi pin Set both BPSO and BPS1 pins so that they will conform to baud rate of HLS center IC to which MKY 37 is connected Table 3 1 Baud Rate at 48 MHz of Driving Clock BPS1 pin BPSO pin Baud rate 12 Mbps 6 Mbps 3 Mbps 1 5 Mbps TEP STE HNICA CO LTD MKY37 User s Manual 3 2 Hardware Reset When a Low level is input to the RST ReSeT pin pin 30 the MKY37 is hardware reset If a period in which the Low level signal has been input is less than one clock the signal is ignored to prevent malfunc tion To reset the MKY37 completely the RST pin must be kept Low for 10 or more clock while supply ing a driving clock The RST pin is connected to an internal Schmitt type input buffer so a constant rise time circuit can be connected directly
39. width is 2 x TBPS 333 ns at 6 Mbps Strobe indicating when to read 16 bit Di Di is read at the pulse central timing Pulse width is 2 x TBPS 333 ns at 6 Mbps Satellite IC MKY37 Pin to set position STB1 of STB2 to STB1 Generated after STB2 Generated before STB2 117 Passage of time Pin to set generation of STB2 53 Every scan of STB2 generation 2 Handshaking with centerIC Pin to forcibly clear Do state Low Used to prevent system failure App 3 TEP STE HNICA CO LTD MKY37 User s Manual Appendix 2 Model Diagram for Cascade Connection Set upper 5 bits of Network cable satellite address Place oscillator as near as possible Oscillator 48 MHz Set both BPS pins to conform to baud rate of center IC Note Fixing IAO at High or Low prevents duplication of SA App 4 TEP Appendix S TECHNICA Co LTD App 5 North America Distributor Trans Data Technologies Inc 340 Arthur Ave Roselle IL 60172 Telephone 630 440 4075 Facsimile 630 539 4475 e mail info steptechnica us http www steptechnica us E Developed and manufactured by Step Technica Co Ltd 757 3 Shimo fujisawa Iruma shi Saitama 358 0011 TEL 04 2964 8804 FAX 04 2964 7653 http www steptechnica com infoOsteptechnica com Hi speed Link System Satellite IC MKY37 User s Manual Document No STD HLS37 V1 3E Issued

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