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Intel mcs-48 manual 16,384·8IT ROM with

Models: mcs-48

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8355*/8355-2**

16,384·8IT ROM WITH 110

*Directly Compatible with 8085A CPU

**Directly Compatible with 8085A-2

•2048 Words x 8 Bits

•Single + 5V Power Supply

•Internal Address Latch

•2 General Purpose 8·Bit \/0 Ports

•Each \/0 Port Line Individually Programmable as Input or Output

•Multiplexed Address and Data Bus

•40·Pin DIP

The Intel® 8355 is a ROM and I/O chip to be used in the MCS-85'·microcomputer system. The ROM portion is organized as 2048 words by 8 bits. It has a maximum access time of 400 ns to permit use with no wait states in the 8085A CPU.

The 1/0 portion consists of 2 general purpose 1/0 ports. Each 1/0 port has 8 port lines, and each 1/0 port line is indivduo ally programmable as input or output.

The 8355-2 has a 300ns access time for compatibility with the 8085A-2 microprocessor.

PIN CONFIGURATION

BLOCK DIAGRAM

	Vee
	PB,	elK
		elK
	PB,
RESET	PB,	READY
N.C. (NOT CONNECTED) 5	PB,	READY
N.C. (NOT CONNECTED) 5	PB,
	PB,	ADo_7		~
	PB,
	PB,	A B- 10			PA -
RD		A B- 10			O 7
RD	PB.	eE,
lOW	PA,	eE,
lOW		CE,
		CE,	ROM
	PA,	101M	G~
AD.	PAs	101M
AD.	PAs	ALE			PB -
AD,	PA,	ALE			O 1
AD,	PA,	RD
		RD
AD,	PA,	lOW
AD,	PA,	RESET
AD,	PA,	iDA
		iDA
AD,	PAD
AD,
AD,				Vee	(+5VI
AD,
VSS				Vss	fOV)
VSS

INT£l CORPORATION ASSlHS NO RESPONSIBIlITY FOR THE USE OF ANY CIRCUITRY OTHER THAN CIICUITRY EMBOOIEO IN AN IIITEl PROOOCT. NO OTItER CIRCIIIT PATENT LICENSES ARE IMPLIED. "INTEL CORPORATION. 1979

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Intel mcs-48 manual 16,384·8IT ROM with

Contents

Page MCS-48 Family of Single Chip Microcomputers Usersmanual SeptemberBXP MultibusCredit PromptTable of Contents Chapters 8051/8751/8031 MicrocomputerEmulation Board Emulation Board 10-19 UPP-103 Universal Prom ProgrammerInsite UsersLibrary Packing InformationPage Ntroduction Page Introduction to MCS-48 8021 is code compatible but not pin compatible with Introduction5.0 and 10.0 J,Lsec Cycle Versions Eprom IntroductionTil Introduction Function of a Computer Typical Computer SystemArchitecture of a CPU AccumulatorProgram Counter Jumps, Subroutines and the Stack Three levels of subroutines may be ac- commodated Instruction Register and DecoderAddress Registers Arithmetic/Logic Unit ALUControl Circuitry Computer OperationsTiming Instruction FetchInterrupts Memory WriteInput/Output When finished the processor continues on To the next instructionsStep No. Hex Code Assembly Code MOV RO, #32 Our machine language program then becomesStep Hex Code MOV R2, #05SUB R7 ADD A, # ALFA*BETA/2Cpla ADD A, REG Hardware Configuration Developing An MCS-48 Based ProductEducation Function DefinitionPrompt Intellec Development System ProductionPage Single Component MCS-4S S~stem Page Arithmetic Section SummaryArchitecture ~BUS Single Component System LocationSingle Component System Input/OutputSingle Component System R23 PointerJump Conditions +--1 RInterrupt Timing As a Timer As an Event CounterClock and Timing Circuits OscillatorALE --f---+--+ 111 InstructionLOVI RUN Stop Power Down ModeBUS PCO·7 Pin Description 00-07 DesignationProg Number FunctionReset Programming, Verifying and Erasing EpromSingle Component System Reset Test and DebugSingle Step Disabling Internal Program MemoryReading Internal Program Memory Program Memory Following is a functional description of the major elementsTimer/Event Counter Oscillator and ClockInput/Output Capabilities QUASI-BIDIRECTIONAL Port StructureExpanded I/O 1 T1 InputHigh Current Outputs Reset Carry Flag Timer Overflow Flag10 CPU Jump Test Condition Instructions AccumulatorData Memory Functional SpecificationsProgram Memory 15Timer/Event Counter Oscillator and ClockPort 0 Comparator Inputs See the 8021 description, .8, for a com- plete explanationTest and Interrupt Inputs High Current OutputsExpanded 1/0 1-3 VAC Ill Analog to Digital Converter19 CPU Expanded Page Summary Expansion of Program MemoryExpanded MCS-48 System Interrupt RoutinesLatch AI? LatchROM Expansion of Data Memory IOWExpansion of Input/Output EXPAND!!D MCS-48 SystemII AA Read OO-Port #4 Write Port #5 10 or Port #6 Port #7Keyboard RD DisplayExpanded MCS-48 System Expansion Examples See Also ChapterMulti-Chip MCS-48 Systems Memory Bank Switching =====ll 8~~5Control Signal Summary Port CharacteristicsBUS Port Operations Port 2 Operations000 Page Page Instruction SET Instruction SET Subroutines Instruction SET Instruction SET Summary 8021 Instruction SET Summary RETPSW Symbols and Abbreviations UsedDBF ADD A,R r Add Register Contents to Accumulator ADD A,@R r Add Data Memory Contents to AccumulatorAddc A,R r Add Carry and Register Contents to Accumulator ADD A,#data Add Immediate Data to AccumulatorANL A,@R r Logical and Accumulator With Memory Mask Addc A,#data Add Carry and Immediate Data to AccumulatorANL A,R r Logical and Accumulator With Register Mask Anld Pp,A Logical and Port 4-7 With Accumulator Mask ANL A,#3+X/Y Andacc Contents with Value of EXP 3+X/YANL A,#data Logical and Accumulator With Immediate Mask Andport 4 Contents With ACC BitsMOV RO,#50 Move 50DEC to Address INC RO Increment REG RET Return to Main Program10010101111 Contents of the accumulator are cleared to zero Cpla CPL Aacc Contents are COMPLE- Mented to11010 Flag 1 is cleared to zero F1-0 11 00 0 Flag 0 is cleared to zeroDA Aacc Adjusted to 00000001 with C SET AC 7 4 3 0 o 1 0 ADD SIX to Bits 010100001ADD SIX to Bits Overflow to CExample Decrement contents of external data memory location DEC Rr Decrement Register Not in 8021EN I Enable External Interrupt EN Tcnti Enable Timer/Counter Interrupt NotEnto ClK Enable Clock Output Not in 8021,8022 A,Pp Input Port or Data to AccumulatorINC @R r Increment Data Memory Location INC a Increment AccumulatorINC Rr Increment Register IputoPort 0 Data to Accumulator 8021, 8022 Only INS A,BUS Strobed Iput of BUS Data to AccumulatorJBb address Jump If Accumulator Bit is Set Not in 8021 JC address Jump If Carry Is SetJF1 address Jump If Flag 1 Is Set Not in 8021 JMP address Direct Jump Within 2K BlockJmpp @A Indirect Jump Within JNC address Jump If Carry Is Not SetJNI address Jump If Interrupt Input is Low Not in 8021 Jnto address Jump If Test 0 Is Low NotJNT1 address Jump If Test 1 Is Low JNZ address Jump If Accumulator Is Not ZeroJump to Timerroutine IFTF=1Jump to Location 53 DEC Jump to CountroutineMaV A,PSW Move PSW Contents to Accumulator Not in 8021 MaV A,R r Move Register Contents to AccumulatorMaV A,@R r Move Data Memory Contents to Accumulator Mev A, #data Move Immediate Data to AccumulatorMev A,T Move Timer/Counter Contents to Accumulator MaV @Rr,A Move Accumulator Contents to Data Memory Movp A,@A Move Current Page Data to Accumulator Movo A,Pp Move Port 4-7 Data to AccumulatorMovo Pp,A Move Accumulator Data to Port Maxdm Movx A,@R1 Move Contents of Location MOVP3 A,@A Move Page 3 Data to Accumulator Not in 8021,8022Not in 8021 Current page are Moved to ACCNOP The NOP Instruction ORL A,Rr Logical or Accumulator With Register MaskORL A,@Rr Logical or Accumulator With Memory Mask ORL A,#data Logical OFJ Accumulator With Immediate Mask8021 Outl Pp,A Output Accumulator Data to Port 1 or Retr Return With PSW Restore Not in 8021 Rrnc RR Anew ACC Contents are Example Assume carry is not set and accumulator containsRrtc RRC a Carry is SET and ACC ContainsSEL MBO Select Memory Bank JMP $+20Jump to Location 48 HEXStop Tcnt Stop Timer/Event-Counter 10110101011Jump to Routine Intif ACe BIT 3 is SET REG 7=8Swap a Swap Nibbles Within Accumulator Strt T Start TimerStrt CNT Start Event Counter Xchd A,@R r Exchange Accumulator and Data Memory 4-Bit Data XCH A,R r Exchange Accumulator-Register ContentsXCH A,@R r Exchange Accumulator and Data Memory Contents XRL A,@R1 Xoracc Contents with Mask Location XRL A,Rr Logical XOR Accumulator With Register MaskXRL A,@Rr Logical XOR Accumulator With Memory Mask XRL A,#data Logical XOR Accumulator With Immediate MaskAppli~ation Examples Page Crystal Oscillator Mode LC Oscillator ModeIntroduction Driving from External SourceReset Application Examples~~J Rvv-i T1 Multiple Interrupt Sources Tf ~r Ii617&A3 Serves as address latchTt-2 A7 Xtali ROM=!-39TO Both 1/0 and RAM are addressed as data memoryF1L This configuration is explained in sectionReset Expander ~fd...L Pinnumbers are Different for~1~ DB6 rAdding 8 Input Lines Application Examples ·15Adding Output for KEYBOARD/DISPLAY Scanning JfL RT T T T TApplication Examples Emulator Circuit DESCRIPTION-6 MHZ Substitute aInterface to Drum Printer II Keyboard Display TimerRAM Microwave Oven Controller Double ADD Double SubtractDouble Load Double StoreApplication Examples Double Exchange Double Left Logical ShiftDouble Right Logical Shift Double Right Arithmetic ShiftApplication Examples Binary Multiply Interrupt HandlingApplication Examples Byte Processing System R1,ACPL Subtract Second from First INC 2sCOMPLEMENT and ADD8 MULTIPLY-ASSEMBLED by MCS-48 Macro Assembler See AP-49IIn ·1 APP\,JCATION Examples 16 x 8 DIVIDE-ASSEMBLED by MCS-48 Macro ASS.E.MBLERSEE AP-4916 x 8 DIVIDE-ASSEMBLED by MCS-48 Macro Assembler see AP-49 Page MCS-4STMComponent Page Hmos Single Component 8-BIT Microcomputer IIH!TUsed to enable data onto Address latch enable. ThisSignal occurs once during Program store enable. ThisS04SH/S04SH-1 /S035HL-1/S035H L-1 Inter 8048H/8048H-1/8035HL/8035HL.1 Absolute Maximum RATINGS·Port 2 Timing BUS Timing AS a Function of TCYS04SH/S04SH-1/S035HL/S035HL-1 WaveformsRead From External Data Memory 8035HL8048H/8048H·1/8035HL/8035HL·1 J3 Xtal ZPIN Configuration Logic Symbol Block Diagram RllPIN Configuration Logic Symbol Block Diagram8048/8035L/8748/8748-6/8748-8/8035/8035-8 PIN DescriptionAFN-Q1354A-03 All Except XTAL1, XTAL2, Reset Input High Voltage X1, X2, RESEiVOL =2.0 mA Output Low Voltage 10L = 1.8 mA===i---h·1 Characteristics Port 2 Timing Crystal Oscillator Mode LC Oscillator ModeDriving from External Source PROGRAMMING, VERIFYING, and Erasing the 8748 EpromTA = 2SOC ± SoC, Vee =SV ± S%, Voo = 2SV ± PROMPT-48 Microcomputer Design Aid, or Waveforms for ProgrammingVerify .I.~---PROGRAM Intel Corporation 108048/8748/8035L 108048/8748/8035L Operating Characteristics IDS0481S7481S035LAbsolute Maximum RATINGS· BUSP1, P2BUS, P1, P2TAW Address Setup to WR 260 TAD Address Setup to DataTOR Data Hold PSEN, RD to DataCharacteristics Top Port Control Setup Before Failing Edge of ProgTpL Port 2 I/O Data Setup TA= -40·Cto +85·C, Vcc=5V ±10%, Vss=OVCrystal Oscillator Mode Driving from External Source Reset+-----t XTALl ProgTA =25C ± 5C, Vee =5V ± 5%, Vee =25V ± TA = 25C ± 5C, Vee = 5V ± 5%, Vee = 25V ±Waveforms for Programming PROMPT-48 Microcomputer Design Aid. orInter Programming Verification Lcoscillator ModeVoo IPH Unit Test ConditionsVoo Program Voltage High Level 24.0 2S.0 EA Program or Verify Voltage High Level 21.5 24.5 8748EA 5 M8048/M8748/M8035LM8048/M8748/M8035L Pin # ProgTcp Port Control Setup Before Falling TpL Port 2 1/0 Data SetupTpo Output Data Hold Time Tpp Prog Pulae Width TLP Port 2 1/0 Data Hold 120Characteristics ALE JI ~----r---I LAN D Operati NG Characteristics BUS, P1, P2Inter 80411803118031 8049/8039 Operating Characteristics Symbol Parameter Min Max UnitALE JIL --------..1.--1----L 18049/8039 Mask Programmable ROM External ROM or Eprom MHz OperationINr IntJ18049/8039 TilVIH1 BUS, RD, WR, PSEN, ALEVOL2 BUS, RD, WR, PSEN, ALE VOH1TAFC--1 I~OATING-I t=t or WaveformsOutput Data Setup Time 230 Port 2 1/0 Data Setup 300TA = -400C to +850 C, Vee = Voo = +5V ±10%, Vss = OV Unit Conditions NoteCrystal Oscillator Mode LC Oscillator Mode XT AL1PIN Configuration Logic Symbol Block Diagram 8021OC to 70C V1Hl Input High Voltage Xtal 1 & 2, T1VIH10% Input high voltage all except Xtal 1 T1, RESElALE XTAL28022 Reset Avss Prog POO-P07VTH Varef ANO,AN1 ALE Xtal8022 FzxIpAL---ooj·1 Port 2 TimingAID Converter Characteristics Analog Input TimingCNT Analog Input 0, Analog Input TimerMnemonic for in-page Operation Inter PIN Description GNDAbsolute Maximum Ratings ~~x 125 P20-P23 -- .....--X..... ...Jr 108243 14P5218243 GND18243 Tes # pins= 60 mA-+- 8 mA/pin = 7.5= 1 2 3 4 5 6 7 8 9 10 11 12Output Expander Timing 16,384·8IT ROM with Reset CE1CE2 ReadySymbol Parameter MIN MAX 8355/8355-2III ILO+- Al ~ Cl ~8355/8355·2 Input ModeOutput Mode PIN Configuration Block Diagram Directly Compatible with SOS5A CPUPROG/CE1 8755A8755AFUNCTIONAL PIN Definition SA Programming Module Cross Reference Module Name USE with UPPUPPI41 UPP UP2121Symbol Parameter MIN MAX VIL 8755AComment Ready Hold TimeClock Specification for 8755A Prom Read, 1/0 Read and Write TimingWait State Timing Ready =0 Voo Programming Voltage during Write To Eprom Specification ProgrammingITA =OC to 70C Vee =5V ± 5% Vss =OV Program Mode Timing Diagram Enable 8085A 8085A-28155-2 8156-28155/8156 PIN Functions Timer OUT8155/8156/8155-2/8156-2 Description 8156 Internal RegistersProgramming Command Register Reading the Status RegisterControl Input Mode Output Mode INPUT/OUTPUT SectionBFLowLow INTRLowHigh STB8155/8156/8155-2/8156-2 PcaTimer Section Example Program WR AD ALE 8085A Minimum System ConfigurationInterval Timer Interrupt Levels Symbol Parameter MIN MAX Units Test Conditions VIL Symbol Parameter MIN MAX UnitsRead Cycle Write Cycle8155/8156/8155-2/8156-2 WI\ J / jBasic Input Mode Basic Output ModePIN Configuration Block Diagram PIN NamesTruth Table for Power Down and Function Enable 8185/8185-2Operational Description Truth Table for Control and Data BUS PIN StatusAbsolute Maximum Ratings Comment8185/8185-2 Page Page SINGLE-COMPONENT 8-BIT Microcomputer 0INTRODUCTION 8051 FamilyMACRO-VIEW of the 8051 Architecture 8051 CPU Architecture21/0 Facilities ON-CHIP Peripheral Functions1Interrupt System 8031/8051/8751 3Timer/Event Counters 8031/8051/87518031/8051/8751 4Serial Communications~=- J~~====~ ~DATA 8031/8051/8751 Circuit ground potentialPsen XTAL1XTAL2 Family Development System and Software SupportSymbol Parameter Min Typ Max Units Universal Prom Programmer Personality Card UPP-851Workshop Insite Library12MHz Clock Data Memory Write Cycle Inter8031/8051/8751 8051 Instruction SET SummaryInter All mnemonics copyrlghted@ Intel CorporationPage Compatible MCS-48 Components PIN Configuration 1024 X 4 BIT Static RAM2114A Family Unit Symbol ParameterAddress -..II-------------i--l Typical D.C. and .A.C. Characteristics Normauzed Access Time VS Supply Voltage2316E 16K 2K 8 ROM 2316E Data ----=HIGHZ~--~~~~~~~~~~-OU-T~TV-ALIO~~~JlJJI PIN Configuration PIN Connection During Read or ProgramBB Power Supply 5V±5% 5Vt.5% -5V±5% -5V±10% Operating CharacteristicsFamily Nco and A.C.OPERATING Conditions During ReadAddress to Output Delay 2708·1 limits 2708·6Limits UnitsInput Capacitance VIN = OVFamily WaveformsPIN Configuration Mode Selection PIN NamesProgramming CE = VIH. OE = VIL2716 Cout2716 Typical 16K Eprom System2716 Device OperationApproved 8086·2 MPU .. .Zero Wait StateTwo Line Control Industry Standard Pinout . .. Jedec8205 Ei==~ fEH2·E3 A13 --..,-H+-q E 8205Applications Eii-+-IH-+t-t rState Decoder Circuit Typical Characteristics \.. ~ ~TA = O·Cto + 75·C, Vee = 5V ± 5% MIN MAXSwitching Characteristics CharactristicsConditions of Test Test Load Test WaveformsPIN Configuration Logic Diagram IT osGD ~s ------- + H DB ---------- -- +iFunctional Description Il D+-+1 IE DBasic Schematic Symbols II. Gated Butter 3-StateGated Buffer DS2 , ------,----.J8212 Here the 8212 is used as the status latch for an 8080A VI. Output Port With Hand-ShakingAD2 Bossa AD4 AD5 AD6 AD7~DI, Stbdo LOW Order CLR8212 Output Currents 100mAInput Load Current, ACK, OS2, CR VF = A5V IOL = 15mAFfi IliSwitching Characteristics Typ. Max CIN 051 MD Input Capacitance 9pF 12pF052. CK. ACK. DI1-Dls Input Capacitance 5pF DOs Output Capacitance 8pFTCI II,D SGS821413214 Icex8214/3214 CapacitancesInte Test Conditions Test Load Circuit·BITPARALLEL Bidirectional BUS Driver 001Bidirectional Driver Control aatlng OlEN, CSWaveforms Characteristics OUT O---TIFI IF2 IRI IR2 VIL VIH Voli VOL2821618226 Applications of the 8216/82268282/8283 Octal Latch010 VCCPIN Definitions Operational Description PinD.scrlptlonVOL VOH TivovTshov TehozJJ\~ J/~~ 8282/8283 Intel VeeAo-A7 Bo- B7Characteristics for 8286/8287 Output Delay vs. Capacitance Jk~Output Page Page Synchronous and Asynchronous Operation Synchronous 5·8 Bit CharactersFeatures and Enhancements Iofl CapacitanceCapacitance pF Bus Parameters !Note Input Waveforms for AC TestsMIN MAX Unit Programmable Interval Timer General VIIi -.,--.,qSystem Interface Control Word RegisterOperational Description GeneralProgramming Control Word Format825318253·5 Mode 2 Rate Generator =41 I---t--n --+MSB 8253/8253-5LSB Read Operation Chart Mode Register for Latching CountRead Operations Reading While CountingOe to 700 e Bus Parameters Note Input Waveforms for A.C. TestsRe.dCycle Write Timing825318253·5 Clock and Gate TimingPIN Configuration 8255A Block Diagram Programmable Peripheral Interface8255A18255A·5 8255A Functional Description8255A Basic Operation Face peripheral devices or structuresPIN Configuration PIN Names 8255A18255A·5Group a and Group B Controls Ports A, B, and C8255A Operational Description Mode SelectionSingle Bit Set/Reset Feature Operating Modes Interrupt Control FunctionsMode 0 Port Definition Mode 0 Configurations8255AJ8255A·5 PA7·pAoII I I I, I0 I0 I0 Input Control Signal Definition TPHIBF Input Buffer Full F/F Intr Interrupt RequestOutput Control Signal Definition 10 I ·IOMXlXlIntea Inte BCombinations of Mode Bidirectional Bus 1/0 Control Signal DefinitionOutput Operations Input Operations8255.Al8255A·5 LtAOiErXtJ I 0\ \, I, erXtJ I0\Only Mode Definition Summary30AFN-00744A-14 Applications of the 8255A Printer InterfacePC, r MSBCapacitance Read MIN. MAX UnitCIR TwB TRIT LtR1BjSIB-Ii Programmable Interrupt Controller SP/EN8259A Basic Functional Description 8259AInterrupts in Microcomputer Systems Interrupt Request Register IRR and IN·SERVICE Register ISR Priority ResolverInterrupt Mask Register IMR INT Interrupt8259A 8259A Interface to Standard System BusCascade BUFFER/COMPARATOR Interrupt Sequence~O ~ ~ Disable Function Programming the 8259AGeneral Input Operation ReadInitialization Command Words 1 and 2 ICW1,ICW2 Initialization Command Word 3 ICW30 I 0 I 0 I 0 I 0 lID, liD, lIDo 8259AOperation Command Words OCWs Operation Control Word 1 OCW1Operation Control Word 2 OCW2 Operation Control Words Ocwi OcwaR,-r-- I-i-Ioo r,-r,-r Operation Command Word FormatOJNTl Special Mask Mode Buffered ModeFully Nested Mode Special Fully Nested ModeWord enabled onto the data bus during m5 is Automatic END of Interrupt Aeoi ModeRotating Priority Mode B Rotation by Software WolPriority Cell Simplified Logic Diagram Level Triggered ModeThis mode is programmed using bit 3 in ICW1 OH-++-+8272 Features 8272Registers CPU Interface Description8272 Polling Feature Reset to the Interrupt signalIntJ Command SET Command Descriptions Read DataWrite Data Transfer Capacity EN End of Cylinder Flag No No Data FlagWrite Deleted Data Read Deleted DataRead a Track ReadidScan Commands Recalibrate Sense Interrupt StatusSpecify Sense Drive StatusStatus Registers BIT Name Symbol Description UsaDC Characteristics VIL CLK & WR CLK VIHCINI» VIN=OVICY ~-----~---V Sel-I Timing Measurement ConditionsLI3 Block Oiagram8273, 8273·4, 8273·8 Brief Description of HDLC/SDLC Protocols32XCLi Flag DETProgrammable KEYBOARD/DISPLAY Interface RAMPrinciples of Operation 827918279-5Hardware Description 827918279·5 Software Operation End Interrupt/Error Mode Set Status WordData Read Data WriteInterface Considerations Scanned Keyboard Mode, 2·Key Lockout===~ General Block Diagram ApplicationsIIL1 Symbol Test TYP MAXVIL2 Input Waveforms for A.C. Tests BUS Parameters8279 Scan Timing Scan Waveforms Display WaveformsGpib TALKER/LISTENER 8291 System Diagram 8291General Purpose Interface BUS Gpib General DescriptionAcds PacsAcrs PpasSH,AH,T,TE,L,LE,SR,RL,PP,C AH,CRemote Messages Received ATN SH,AH,T,TE,L,LE,PP,C DAB DACRemote Messages Sent ATN DAB DACDAV ENDAll Write Registers DontCareSPAS---SPAS Spasc Llcno LLO Lloc Interrupt RegistersMenting this feature, with 80 and Bi enabied from ITO ILO I 0 I 0 I 0 I 0 Admi Aomoi Section on Parallel Poll Protocol Command Pass Through RegisterProvided for Auxiliary Mode Register Auxiliary CommandsInternal Counter 2NFAuxiliary Register a Auxiliary Register BReset Procedure Parallel Poll Protocol8291 Using DMA 8291 to 8291A Software Compatibility Device Electrical Characteristics VOH-INTIlol IlohTwA~ Timing WaveformsGpib Timingsii Modified State Diagrams Figure A.1 State Diagrams next101 TE,L,LE,C,CE Settling Time for Multiline Messages 21stResponse to ATN 200ns Interface Message Accept Time t Figure C-l -Wire Handshake Timing at Appendix CFigure C.2. Handshake Flowchart IIIL---,--11 ,--I 105Gpib Controller 106Ai1W Gpib Transceiver EOI BUS1BUS9 OATA1Mode 0 PIN Description =OVGpib NDAC* I/OIeee Gpib NrfoTIL Ndac Mode 1 PIN DescriptionMode 2 PIN Description Nrfd IeeeMode 3 PIN Description R1L LIENTiR1 Operating Characteristics 8293Absolute Maximum Ratings CapacitanceCharacteristics TA = O·Cto 70·C Vee= 5.0V ± 10% GND = OVTYP.· MAX ·118Output Loading Test Circuits 8293 Waveforms8294 8295 ·122====J 123UPI·41A Features Enhancements Data Moves Signal DescriptionMnemonic Description Bytes Cycles 8041 Al8641 Al8741 a VIU IU1Input and Output Waveforms for A.C. Tests Typical 8041/8741A CurrentRead OPERATION-DATA BUS Buffer Register Write OPERATION-DATA BUS Buffer RegisterWAVEFORMS-DMA CHARACTERISTICS-PORTCHARACTERISTICS-DMA PROGRAMMING, VERIFYING, and Erasing the 8741A Eprom VOOVdol Timing Specification for ProgrammingSpecification for Programming Program 8041Al8641 Al8741ASupport Products Page Microcomputer Development System CreditMODEL225 Functional Description 10-2InterMODEL225 System Components Integral CRTPeripheral Interface ControlSpecifications Notavailable on bus 110V, 60 Hz 5.9 Amp 220V, 50 Hz 3.0 Amp9800556 9800292Page Intellec Prompt MCS·48 Microcomputer Design AID Intellec Prompt Features Single Component Compu.terPrompt 48 Commands and Functions Intellec PromptIntellec Prompt Functional Description MCS-48 ProcessorsCycle Time tCY = 2.5,..s Clock 6 MHz ± 0.1% User Interrupt causes an Interrupt only IfPrompt system Is running a user program Ordering Information MCS·48 IN·CIRCUIT Emulator ~ L · ICE·49Memory Mapping GO from .START Till XDATA. Rslt WrittenICE·49 ISIS·IIEM1 Emulation Board EM1 EM1 Specifications DC Power Vcc5V ±5% Icc 300 mA maxOrdering Information MDS·EM1EM2 Emulation Board 40·PIN Socket Configuration EM2 Block Diagram EM2ANO AN1MDS-EM2 EM2UPP-1P3 Canadian Sales Offices SeptemberCanadian Distributors TAvnet Electronics McCormick Avenue Costa MesaIntJ Bowers Avenue International Sales and Marketing Offices International DISTRIBUTORS/REPRESENTATIVESInternational Sales and Marketing Offices INTEL$ Marketing OfficesCanadian Service Offices