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MITSUBISHI MICROCOMPUTERSMSL8041A-XXXPSLAVE MICROCOMPUTERDESCRIPTIONThe M5L8041 A-XXXP is a general-purpose, programmableinterface device deisgned for use with a variety of 8-bitmicrocomputer systems. This device is fabricated using Nchannel sillicon-gate ED-MOS technology.FEATURES• Mask ROM·· .. ································· 1024-word by 8-bit• Static RAM········································ 64-word by 8-bit• 18 programmable 1/0 pins• Asynchronous data register for interface to master processor• 8-bit CPU, ROM, RAM, 110, timer, clock and low power,stand-by mode• Single 5V supply• Alternative to custom LSI• Interchangeable with i 8041 AAPPLICATIONAlternative to custom LSI for peripheral interfacePIN CONFIGURATION (TOP VIEW)TEST PIN 0CLOCK 1 X1 -+ 2CLOCK 2 X 2 -+ 3RESET RESET -+ 4SINGLE STEP S8 -+ 5CHIP SELECT CS -+ 6EXTERNALACCESS (NOTE 1) E~ -+ 7READ R -+ 8ADDRESS Ao -+ 9WRITE W-+ 10SYNCHRS?~~ZAE~ SYNC -+ 11DATA BUSNote 1DOo" 12Outline 40P4Vee (5V)TEST PIN 1INPUT/OUTPUTPORT 127 .. P1 026 Voo (5V) EXTERNAL25 -+ PROG I/OCONTROL!Connect to Vss in the operating condition.INPUT/OUTPUTPORT 2IIBLOCK DIAGRAMINPUT/OUTPUT PORT 2AoRESETSINGLE STEPTEST PIN 0TEST PIN 1READWRITECHIP SELECTADDRESS'-------{7 EA EXTERNAL ACCESS(NOTE1)~ ~ PROG'--v---"'EXTERNAL 1/ o CONTROLCLOCK SYNCHRONIZEDSIGNAL• . MITSUBISHI"ELECTRIC5-25
MITSUBISHI MICROCOMPUTERSMSL8041A-XXXPSLAVE MICROCOMPUTERFUNCTIONThe M5L8041A-XXXP is designed as an ordinary 8-bit CPUperipheral LSI chip and it contains a small stand-alone microcomputer.Although this microcomputer functions independently,when it is used as a peripheral controller, it iscalled the slave microcomputer in contrast to the mastercomputer. These two devices can transfer the data altern a-tively through the buffer register between them. TheM5L8041 A-XXXP contains the buffer register to use this LSIas a slave microcomputer and it can. be accessed in thesame way as other standard peripheral devices. Since theM5L8041 A-XXXP is a complete microcomputer, it is easy todevelop a user-oriented mask-programmed peripheral LSIonly by changing the control software.PIN DESCRIPTIONPinNameVss GroundVee Main power supplyVoo Power supplyToTest pinOX" X2 Crystal inputsRESET Reset- SS Single stepCS Chip select inputEAExternal access- R Read enable signalAoAddress input,-W Write enable signalSYNC Sync signal outputDOo-D0 7 Data busP2o-P2 7 Port 2PROG ProgramPl o -P1 7 Port 1T, Test pin 1Input or output---InputInputInputInputInputInputInputInputInputOutputInput/outputInput/outputOutputInput/outputInputFunctionConnected to a OV supply (ground).Connected to a 5V supply.Connected to a 5V supply.Used as a memory hold when Vcc is cut off.Provides external control of conditional program jumps (JTO/JNTO instructions).An internal clock circuit is provided so that by connecting an RC circuit or crystal to these input pins theclock frequency can be determined. Pins X, and X 2 can also be used to input an external clock signal.CPU initialization input.Used to halt the execution of a command by the CPU, When used in combination with the SYNC signal,the command execution of the CPU can be halted every instruction to enable single step operation.Chip select input data bus control.Normally maintained at OV.Serves as the read signal when the master CPU is accepting data on the data bus from the M5L8041A-XXXP.An address input used to indicate whether the signal on the data bus is data or a command.Serves as the write signal when the master CPU is outputting data from the bus to the M5L8041A-XXXP.Output 1 time for each machine cycle.Three-state, bidirectional data bus. Data bus is used to interface the M5L8041A-XXXP to a master systemdata bus.Ouaisi-bidirectional port. When used as an input port, FF,6 must first be output to this port.After resetting, however, when not used afterwards as an output port, this is not necessary.P2o-P2 3 are used when the M5L8243P I/O port expander is used.Serves as the strobe signal when the M5L8243P I/O expander is used.Ouaisi-bidirectional port. When used as an input port, FF,6 must first be output to this port.After resetting, however, when not used afterwards as an output port, this is not necessary.Provides external control of conditional program jumps (JTl /JNTl instructions).Can serve as the input pin for the event counter (STRT CNT instructions) .5-26• ,MITSUBISHI.... ELECTRIC
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MITSUBISHI MICROCOMPUTERSCONTENTSDG
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GUIDANCE D
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MITSUBISHI MICROCOMPUTERSDEVELOPMEN
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MITSUBISHI MICROCOMPUTERSSYMBOLOGYN
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. MITSUBISHI MICROCO.MPUTERSQUALITY
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MITSUBISHI MICROCOMPUTERSPRECAUTION
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MELPS 740 MICROCOMPUTERSEJ
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MIC-ROCOMPUTER SUPPORT SYSTEMS
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APPENDICES
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CONTACT ADDRESSES FOR FURTHER INFOR
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1984 MITSUBISHI DATA BOOKSINGLE-CHI
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MEMO
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