Page
 MCS-48 Family of Single Chip Microcomputers Usersmanual
September
 Credit
BXP
Multibus
Prompt
 Table of Contents
 Chapters
8051/8751/8031 Microcomputer
 Insite UsersLibrary
Emulation Board
Emulation Board 10-19 UPP-103 Universal Prom Programmer
Packing Information
Page
 Ntroduction
Page
 Introduction to MCS-48
 Introduction
5.0 and 10.0 J,Lsec Cycle Versions
8021 is code compatible but not pin compatible with
 Introduction
Til
Eprom
 Introduction
 Architecture of a CPU
Function of a Computer
Typical Computer System
Accumulator
 Program Counter Jumps, Subroutines and the Stack
 Address Registers
Three levels of subroutines may be ac- commodated
Instruction Register and Decoder
Arithmetic/Logic Unit ALU
 Timing
Control Circuitry
Computer Operations
Instruction Fetch
 Memory Write
Input/Output
Interrupts
 When finished the processor continues on
To the next instructions
 Step Hex Code
Step No. Hex Code Assembly Code MOV RO, #32
Our machine language program then becomes
MOV R2, #05
 ADD A, # ALFA*BETA/2
Cpla ADD A, REG
SUB R7
 Education
Hardware Configuration
Developing An MCS-48 Based Product
Function Definition
 Prompt
 Intellec Development System
Production
Page
 Single Component MCS-4S S~stem
Page
 Summary
Architecture
Arithmetic Section
 ~BUS
 Single Component System
Location
 Single Component System
Input/Output
 Single Component System
 R23
Pointer
 Jump Conditions
+--1 R
 Interrupt Timing
 Clock and Timing Circuits
As a Timer
As an Event Counter
Oscillator
 ALE --f---+--+
 111
Instruction
 LOVI
 Power Down Mode
BUS PCO·7
RUN Stop
 Pin Description
 Prog
00-07
Designation
Number Function
 Reset
Programming, Verifying and Erasing Eprom
 Single Component System
 Single Step
Reset
Test and Debug
Disabling Internal Program Memory
 Reading Internal Program Memory
 Program Memory
Following is a functional description of the major elements
 Timer/Event Counter
Oscillator and Clock
 Input/Output Capabilities
QUASI-BIDIRECTIONAL Port Structure
 1 T1 Input
High Current Outputs
Expanded I/O
 10 CPU
Reset
Carry Flag Timer Overflow Flag
Jump Test Condition Instructions Accumulator
 Functional Specifications
Program Memory
Data Memory
 Port 0 Comparator Inputs
15Timer/Event Counter
Oscillator and Clock
See the 8021 description, .8, for a com- plete explanation
 High Current Outputs
Expanded 1/0
Test and Interrupt Inputs
 1-3 VAC
 Ill
Analog to Digital Converter
 19 CPU
 Expanded
Page
 Summary
Expansion of Program Memory
 Expanded MCS-48 System
Interrupt Routines
 AI? Latch
ROM
Latch
 Expansion of Data Memory
IOW
 Expansion of Input/Output
EXPAND!!D MCS-48 System
 II AA
Read OO-Port #4 Write Port #5 10 or Port #6 Port #7
 Keyboard
RD Display
 Expanded MCS-48 System
Expansion Examples See Also Chapter
 Multi-Chip MCS-48 Systems
 Memory Bank Switching
=====ll 8~~5
 BUS Port Operations
Control Signal Summary
Port Characteristics
Port 2 Operations
 000
Page
Page
 Instruction SET
 Instruction SET
 Subroutines
 Instruction SET
 Instruction SET Summary
 8021
 Instruction SET Summary
RET
 Symbols and Abbreviations Used
DBF
PSW
 Addc A,R r Add Carry and Register Contents to Accumulator
ADD A,R r Add Register Contents to Accumulator
ADD A,@R r Add Data Memory Contents to Accumulator
ADD A,#data Add Immediate Data to Accumulator
 Addc A,#data Add Carry and Immediate Data to Accumulator
ANL A,R r Logical and Accumulator With Register Mask
ANL A,@R r Logical and Accumulator With Memory Mask
 ANL A,#3+X/Y Andacc Contents with Value of EXP 3+X/Y
ANL A,#data Logical and Accumulator With Immediate Mask
Anld Pp,A Logical and Port 4-7 With Accumulator Mask
 MOV RO,#50 Move 50DEC to Address
Andport 4 Contents
With ACC Bits
INC RO Increment REG RET Return to Main Program
 11010 Flag 1 is cleared to zero F1-0
10010101111 Contents of the accumulator are cleared to zero
Cpla CPL Aacc Contents are COMPLE- Mented to
11 00 0 Flag 0 is cleared to zero
 ADD SIX to Bits
DA Aacc Adjusted to 00000001 with C SET
AC 7 4 3 0 o 1 0 ADD SIX to Bits 010100001
Overflow to C
 Example Decrement contents of external data memory location
DEC Rr Decrement Register Not in 8021
 Ento ClK Enable Clock Output Not in 8021,8022
EN I Enable External Interrupt
EN Tcnti Enable Timer/Counter Interrupt Not
A,Pp Input Port or Data to Accumulator
 INC a Increment Accumulator
INC Rr Increment Register
INC @R r Increment Data Memory Location
 JBb address Jump If Accumulator Bit is Set Not in 8021
IputoPort 0 Data to Accumulator 8021, 8022 Only
INS A,BUS Strobed Iput of BUS Data to Accumulator
JC address Jump If Carry Is Set
 Jmpp @A Indirect Jump Within
JF1 address Jump If Flag 1 Is Set Not in 8021
JMP address Direct Jump Within 2K Block
JNC address Jump If Carry Is Not Set
 JNT1 address Jump If Test 1 Is Low
JNI address Jump If Interrupt Input is Low Not in 8021
Jnto address Jump If Test 0 Is Low Not
JNZ address Jump If Accumulator Is Not Zero
 Jump to Location 53 DEC
Jump to Timerroutine
IFTF=1
Jump to Countroutine
 MaV A,@R r Move Data Memory Contents to Accumulator
MaV A,PSW Move PSW Contents to Accumulator Not in 8021
MaV A,R r Move Register Contents to Accumulator
Mev A, #data Move Immediate Data to Accumulator
 Mev A,T Move Timer/Counter Contents to Accumulator
 MaV @Rr,A Move Accumulator Contents to Data Memory
 Movo A,Pp Move Port 4-7 Data to Accumulator
Movo Pp,A Move Accumulator Data to Port
Movp A,@A Move Current Page Data to Accumulator
 Not in 8021
Maxdm Movx A,@R1 Move Contents of Location
MOVP3 A,@A Move Page 3 Data to Accumulator Not in 8021,8022
Current page are Moved to ACC
 ORL A,@Rr Logical or Accumulator With Memory Mask
NOP The NOP Instruction
ORL A,Rr Logical or Accumulator With Register Mask
ORL A,#data Logical OFJ Accumulator With Immediate Mask
 8021
 Outl Pp,A Output Accumulator Data to Port 1 or
 Retr Return With PSW Restore Not in 8021
 Rrtc RRC a Carry is SET and ACC
Rrnc RR Anew ACC Contents are
Example Assume carry is not set and accumulator contains
Contains
 Jump to Location
SEL MBO Select Memory Bank
JMP $+20
48 HEX
 Jump to Routine Intif ACe
Stop Tcnt Stop Timer/Event-Counter
10110101011
BIT 3 is SET REG 7=8
 Strt T Start Timer
Strt CNT Start Event Counter
Swap a Swap Nibbles Within Accumulator
 XCH A,R r Exchange Accumulator-Register Contents
XCH A,@R r Exchange Accumulator and Data Memory Contents
Xchd A,@R r Exchange Accumulator and Data Memory 4-Bit Data
 XRL A,@Rr Logical XOR Accumulator With Memory Mask
XRL A,@R1 Xoracc Contents with Mask Location
XRL A,Rr Logical XOR Accumulator With Register Mask
XRL A,#data Logical XOR Accumulator With Immediate Mask
 Appli~ation Examples
Page
 Introduction
Crystal Oscillator Mode
LC Oscillator Mode
Driving from External Source
 Reset
Application Examples
 ~~J
 Rvv-i T1
 Multiple Interrupt Sources
 Tf ~r
Ii6
 Serves as address latch
Tt-2 A7
17&A3
 Xtali
ROM
 =!-39TO
Both 1/0 and RAM are addressed as data memory
 This configuration is explained in section
Reset
F1L
 Expander
 ~fd...L
Pinnumbers are Different for
 ~1~
DB6 r
 Adding 8 Input Lines
 Application Examples
·15
 Adding Output for KEYBOARD/DISPLAY Scanning
 JfL
RT T T T T
 Application Examples Emulator Circuit DESCRIPTION-6 MHZ
Substitute a
 Interface to Drum Printer
 Timer
RAM
II Keyboard Display
 Microwave Oven Controller
 Double Load
Double ADD
Double Subtract
Double Store
 Double Right Logical Shift
Application Examples Double Exchange
Double Left Logical Shift
Double Right Arithmetic Shift
 Application Examples Binary Multiply
Interrupt Handling
 CPL Subtract Second from First INC
Application Examples Byte Processing System
R1,A
2sCOMPLEMENT and ADD
 8 MULTIPLY-ASSEMBLED by MCS-48 Macro Assembler
See AP-49
 IIn ·1
 APP\,JCATION Examples
16 x 8 DIVIDE-ASSEMBLED by MCS-48 Macro ASS.E.MBLERSEE AP-49
 16 x 8 DIVIDE-ASSEMBLED by MCS-48 Macro Assembler see AP-49
Page
 MCS-4STMComponent
Page
 Hmos Single Component 8-BIT Microcomputer
IIH!T
 Signal occurs once during
Used to enable data onto
Address latch enable. This
Program store enable. This
 S04SH/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 TCY
 Read From External Data Memory
S04SH/S04SH-1/S035HL/S035HL-1
Waveforms
8035HL
 8048H/8048H·1/8035HL/8035HL·1
J3 Xtal Z
 PIN Configuration Logic Symbol Block Diagram
Rll
 PIN Configuration Logic Symbol
Block Diagram
 8048/8035L/8748/8748-6/8748-8/8035/8035-8
PIN Description
 AFN-Q1354A-03
 VOL =2.0 mA
All Except XTAL1, XTAL2, Reset
Input High Voltage X1, X2, RESEi
Output Low Voltage 10L = 1.8 mA
 ===i---h·1
 Characteristics Port 2 Timing
 Driving from External Source
Crystal Oscillator Mode
LC Oscillator Mode
PROGRAMMING, VERIFYING, and Erasing the 8748 Eprom
 TA = 2SOC ± SoC, Vee =SV ± S%, Voo = 2SV ±
 Waveforms for Programming
Verify .I.~---PROGRAM
PROMPT-48 Microcomputer Design Aid, or
 Intel Corporation
 108048/8748/8035L
 108048/8748/8035L
 Absolute Maximum RATINGS·
Operating Characteristics
IDS0481S7481S035L
BUSP1, P2BUS, P1, P2
 TOR Data Hold
TAW Address Setup to WR
260 TAD Address Setup to Data
PSEN, RD to Data
 TpL Port 2 I/O Data Setup
Characteristics
Top Port Control Setup Before Failing Edge of Prog
TA= -40·Cto +85·C, Vcc=5V ±10%, Vss=OV
 +-----t XTALl
Crystal Oscillator Mode Driving from External Source
Reset
Prog
 TA =25C ± 5C, Vee =5V ± 5%, Vee =25V ±
TA = 25C ± 5C, Vee = 5V ± 5%, Vee = 25V ±
 Waveforms for Programming
PROMPT-48 Microcomputer Design Aid. or
 Inter
 Lcoscillator Mode
Voo
Programming Verification
 Voo Program Voltage High Level 24.0 2S.0
IPH
Unit Test Conditions
EA Program or Verify Voltage High Level 21.5 24.5 8748
 EA 5
M8048/M8748/M8035L
 M8048/M8748/M8035L
 Pin #
Prog
 Tpo Output Data Hold Time Tpp Prog Pulae Width
Tcp Port Control Setup Before Falling
TpL Port 2 1/0 Data Setup
TLP Port 2 1/0 Data Hold 120
 Characteristics
ALE JI ~----r---I L
 AN D Operati NG Characteristics
BUS, P1, P2
 Inter
 80411803118031
 8049/8039
 Operating Characteristics
Symbol Parameter Min Max Unit
 ALE JIL --------..1.--1----L
 18049/8039
Mask Programmable ROM External ROM or Eprom MHz Operation
 INr
 IntJ18049/8039
Til
 VOL2
VIH1
BUS, RD, WR, PSEN, ALE
BUS, RD, WR, PSEN, ALE VOH1
 TAFC--1 I~OATING-I t=t or
Waveforms
 TA = -400C to +850 C, Vee = Voo = +5V ±10%, Vss = OV
Output Data Setup Time 230
Port 2 1/0 Data Setup 300
Unit Conditions Note
 Crystal Oscillator Mode LC Oscillator Mode
XT AL1
 PIN Configuration Logic Symbol Block Diagram
8021
 VIH10% Input high voltage all except Xtal 1
OC to 70C
V1Hl Input High Voltage Xtal 1 & 2, T1
T1, RESEl
 ALE
XTAL2
 8022
 VTH
Reset Avss
Prog POO-P07
Varef ANO,AN1 ALE Xtal
 8022
Fzx
 IpAL---ooj·1
Port 2 Timing
 AID Converter Characteristics
Analog Input Timing
 Analog Input 0, Analog Input Timer
Mnemonic for in-page Operation
CNT
 Inter
 PIN Description
GND
 Absolute Maximum Ratings
 ~~x
 125
 P20-P23 -- .....--X..... ...Jr
 108243
14P52
 18243
GND
 18243
 Tes
 # pins= 60 mA-+- 8 mA/pin = 7.5=
1 2 3 4 5 6 7 8 9 10 11 12
 Output Expander Timing
 16,384·8IT ROM with
 CE2
Reset
CE1
Ready
 III
Symbol Parameter MIN MAX
8355/8355-2
ILO
 +- Al ~
Cl ~
 Input Mode
Output Mode
8355/8355·2
 PIN Configuration Block Diagram
Directly Compatible with SOS5A CPU
 8755A
8755AFUNCTIONAL PIN Definition
PROG/CE1
 UPPI41
SA Programming Module Cross Reference Module Name USE with
UPP
UPP UP2121
 Comment
Symbol Parameter MIN MAX VIL
8755A
Ready Hold Time
 Clock Specification for 8755A
Prom Read, 1/0 Read and Write Timing
 Wait State Timing Ready =0
 Specification Programming
ITA =OC to 70C Vee =5V ± 5% Vss =OV
Voo Programming Voltage during Write To Eprom
 Program Mode Timing Diagram
 8155-2
Enable
8085A 8085A-2
8156-2
 Timer OUT
8155/8156/8155-2/8156-2
8155/8156 PIN Functions
 Description
8156 Internal Registers
 Programming Command Register
Reading the Status Register
 BFLowLow INTRLowHigh
Control Input Mode Output Mode
INPUT/OUTPUT Section
STB
 8155/8156/8155-2/8156-2
Pca
 Timer Section
 Example Program
 8085A Minimum System Configuration
Interval Timer Interrupt Levels
WR AD ALE
 Symbol Parameter MIN MAX Units Test Conditions VIL
 Symbol Parameter
MIN MAX Units
 Read Cycle
Write Cycle
 8155/8156/8155-2/8156-2
WI\ J / j
 Basic Input Mode
Basic Output Mode
 PIN Configuration Block Diagram
PIN Names
 Operational Description
Truth Table for Power Down and Function Enable
8185/8185-2
Truth Table for Control and Data BUS PIN Status
 Absolute Maximum Ratings
Comment
 8185/8185-2
Page
Page
 SINGLE-COMPONENT 8-BIT Microcomputer
 MACRO-VIEW of the 8051 Architecture
0INTRODUCTION
8051 Family
8051 CPU Architecture
 ON-CHIP Peripheral Functions
1Interrupt System
21/0 Facilities
 8031/8051/8751
 3Timer/Event Counters
8031/8051/8751
 8031/8051/8751
4Serial Communications
 ~=- J~~====~
 ~DATA
 8031/8051/8751
Circuit ground potential
 XTAL2
Psen
XTAL1
Family Development System and Software Support
 Workshop
Symbol Parameter Min Typ Max Units
Universal Prom Programmer Personality Card UPP-851
Insite Library
 12MHz Clock
 Data Memory Write Cycle
 Inter8031/8051/8751
8051 Instruction SET Summary
 Inter
All mnemonics copyrlghted@ Intel Corporation
Page
 Compatible MCS-48 Components
 PIN Configuration
1024 X 4 BIT Static RAM
 2114A Family
 Symbol Parameter
Address -..II-------------i--l
Unit
 Typical D.C. and .A.C. Characteristics
Normauzed Access Time VS Supply Voltage
 2316E 16K 2K 8 ROM
 2316E
 Data ----=HIGHZ~--~~~~~~~~~~-OU-T~TV-ALIO~~~JlJJI
 PIN Configuration
PIN Connection During Read or Program
 Family
BB Power Supply 5V±5% 5Vt.5% -5V±5% -5V±10%
Operating Characteristics
Nco and A.C.OPERATING Conditions During Read
 Input Capacitance
Address to Output Delay
2708·1 limits 2708·6Limits Units
VIN = OV
 Family
Waveforms
 PIN Configuration Mode Selection
PIN Names
 Programming
CE = VIH. OE = VIL
 2716
Cout
 2716
Typical 16K Eprom System
 2716
Device Operation
 Two Line Control
Approved
8086·2 MPU .. .Zero Wait State
Industry Standard Pinout . .. Jedec
 8205
 Ei==~ fEH2·E3
 Applications
A13 --..,-H+-q E
8205
Eii-+-IH-+t-t r
 State Decoder Circuit
 TA = O·Cto + 75·C, Vee = 5V ± 5%
Typical Characteristics
\.. ~ ~
MIN MAX
 Conditions of Test Test Load
Switching Characteristics
Charactristics
Test Waveforms
 GD ~s ------- + H
PIN Configuration Logic Diagram
IT os
DB ---------- -- +i
 +-+1
Functional Description
Il D
IE D
 Gated Buffer
Basic Schematic Symbols
II. Gated Butter 3-State
DS2 , ------,----.J
 8212
 Here the 8212 is used as the status latch for an 8080A
VI. Output Port With Hand-Shaking
 ~DI, Stbdo LOW Order
AD2
Bossa AD4 AD5 AD6 AD7
CLR
 Input Load Current, ACK, OS2, CR VF = A5V
8212
Output Currents 100mA
IOL = 15mA
 Ffi
Ili
 052. CK. ACK. DI1-Dls Input Capacitance 5pF
Switching Characteristics
Typ. Max CIN 051 MD Input Capacitance 9pF 12pF
DOs Output Capacitance 8pF
 TCI
 II,D
SGS
 821413214
Icex
 8214/3214
Capacitances
 Inte
Test Conditions Test Load Circuit
 ·BITPARALLEL Bidirectional BUS Driver
001
 Bidirectional Driver
Control aatlng OlEN, CS
 Waveforms Characteristics
OUT O---T
 IFI IF2 IRI IR2 VIL VIH
Voli VOL2
 821618226
Applications of the 8216/8226
 010
8282/8283
Octal Latch
VCC
 PIN Definitions Operational Description
PinD.scrlptlon
 Tshov
VOL VOH
Tivov
Tehoz
 JJ\~ J/~~
 8282/8283
 Intel
Vee
 Ao-A7
Bo- B7
 Characteristics for 8286/8287
 Output Delay vs. Capacitance
Jk~
 Output
Page
Page
 Synchronous and Asynchronous Operation
Synchronous 5·8 Bit Characters
 Features and Enhancements
 Capacitance
Capacitance pF
Iofl
 Bus Parameters !Note
Input Waveforms for AC Tests
 MIN MAX Unit
 Programmable Interval Timer
 General
VIIi -.,--.,q
 System Interface
Control Word Register
 Programming
Operational Description
General
Control Word Format
 825318253·5
 Mode 2 Rate Generator
=41 I---t--n --+
 8253/8253-5
LSB
MSB
 Read Operations
Read Operation Chart
Mode Register for Latching Count
Reading While Counting
 Oe to 700 e
 Re.dCycle
Bus Parameters Note
Input Waveforms for A.C. Tests
Write Timing
 825318253·5
Clock and Gate Timing
 PIN Configuration 8255A Block Diagram
Programmable Peripheral Interface
 8255A Basic Operation
8255A18255A·5
8255A Functional Description
Face peripheral devices or structures
 Group a and Group B Controls
PIN Configuration PIN Names
8255A18255A·5
Ports A, B, and C
 Mode Selection
Single Bit Set/Reset Feature
8255A Operational Description
 Operating Modes
Interrupt Control Functions
 Mode 0 Port Definition
Mode 0 Configurations
 8255AJ8255A·5
PA7·pAo
 II I I I, I0 I0 I0
 IBF Input Buffer Full F/F
Input Control Signal Definition
TPH
Intr Interrupt Request
 Intea
Output Control Signal Definition
10 I ·IOMXlXl
Inte B
 Output Operations
Combinations of Mode
Bidirectional Bus 1/0 Control Signal Definition
Input Operations
 8255.Al8255A·5
LtAOi
 ErXtJ I 0\
\, I, erXtJ I0\
 Mode Definition Summary
30AFN-00744A-14
Only
 Applications of the 8255A
Printer Interface
 PC, r
MSB
 Capacitance
 Read
MIN. MAX Unit
 CIR
 TwB
TRIT LtR1Bj
 SIB-Ii
 Programmable Interrupt Controller
SP/EN
 8259A
Interrupts in Microcomputer Systems
8259A Basic Functional Description
 Interrupt Mask Register IMR
Interrupt Request Register IRR and IN·SERVICE Register ISR
Priority Resolver
INT Interrupt
 Cascade BUFFER/COMPARATOR
8259A
8259A Interface to Standard System Bus
Interrupt Sequence
 ~O ~ ~
 General
Disable Function
Programming the 8259A
Input Operation Read
 Initialization Command Words 1 and 2 ICW1,ICW2
Initialization Command Word 3 ICW3
 0 I 0 I 0 I 0 I 0 lID, liD, lIDo
8259A
 Operation Control Word 2 OCW2 Operation Control Words Ocwi
Operation Command Words OCWs
Operation Control Word 1 OCW1
Ocwa
 Operation Command Word Format
OJNTl
R,-r-- I-i-Ioo r,-r,-r
 Fully Nested Mode
Special Mask Mode
Buffered Mode
Special Fully Nested Mode
 Rotating Priority Mode B Rotation by Software
Word enabled onto the data bus during m5 is
Automatic END of Interrupt Aeoi Mode
Wol
 This mode is programmed using bit 3 in ICW1
Priority Cell Simplified Logic Diagram
Level Triggered Mode
OH-++-+
 8272
 Registers CPU Interface
Features
8272
Description
 8272
 Polling Feature
Reset to the Interrupt signal
 IntJ
 Command SET
 Command Descriptions
Read Data
 Write Data
Transfer Capacity EN End of Cylinder Flag No No Data Flag
 Read a Track
Write Deleted Data
Read Deleted Data
Readid
 Scan Commands
 Specify
Recalibrate
Sense Interrupt Status
Sense Drive Status
 Status Registers BIT Name Symbol Description
Usa
 CINI»
DC Characteristics
VIL CLK & WR CLK VIH
VIN=OV
 ICY
 ~-----~---V
 Sel-I
Timing Measurement Conditions
 LI3
Block Oiagram
 8273, 8273·4, 8273·8
Brief Description of HDLC/SDLC Protocols
 32XCLi
Flag DET
 Programmable KEYBOARD/DISPLAY Interface
RAM
 827918279-5
Hardware Description
Principles of Operation
 827918279·5
 Software Operation
 Data Read
End Interrupt/Error Mode Set
Status Word
Data Write
 Interface Considerations
Scanned Keyboard Mode, 2·Key Lockout
 ===~
 General Block Diagram
Applications
 Symbol Test TYP MAX
VIL2
IIL1
 Input Waveforms for A.C. Tests
BUS Parameters
 8279
 Scan Timing Scan Waveforms
Display Waveforms
 Gpib TALKER/LISTENER
 8291
 General Purpose Interface BUS Gpib
System Diagram
8291
General Description
 Acrs
Acds
Pacs
Ppas
 Remote Messages Received ATN SH,AH,T,TE,L,LE,PP,C DAB
SH,AH,T,TE,L,LE,SR,RL,PP,C
AH,C
DAC
 DAV
Remote Messages Sent ATN DAB
DAC
END
 All Write Registers
DontCare
 SPAS---SPAS Spasc Llcno LLO Lloc
Interrupt Registers
 Menting this feature, with 80 and Bi enabied from
 ITO ILO I 0 I 0 I 0 I 0 Admi Aomoi
 Command Pass Through Register
Provided for
Section on Parallel Poll Protocol
 Auxiliary Mode Register
Auxiliary Commands
 Auxiliary Register a
Internal Counter
2NF
Auxiliary Register B
 Reset Procedure
Parallel Poll Protocol
 8291 Using DMA 8291 to 8291A Software Compatibility
 Ilol
Device Electrical Characteristics
VOH-INT
Iloh
 TwA~
Timing Waveforms
 Gpib Timingsii
 Modified State Diagrams
Figure A.1 State Diagrams next
 101
 Settling Time for Multiline Messages 21st
Response to ATN 200ns Interface Message Accept Time t
TE,L,LE,C,CE
 Figure C-l -Wire Handshake Timing at
Appendix C
 Figure C.2. Handshake Flowchart
 IIIL---,--11 ,--I
105
 Gpib Controller
106
 Ai1W
 Gpib Transceiver
 BUS9
EOI
BUS1
OATA1
 Gpib
Mode 0 PIN Description
=OV
NDAC* I/O
 Nrfo
TIL
Ieee Gpib
 Mode 1 PIN Description
Mode 2 PIN Description
Ndac
 Nrfd
Ieee
 Mode 3 PIN Description
 R1L
LIEN
 TiR1
 Absolute Maximum Ratings
Operating Characteristics
8293
Capacitance
 TYP.· MAX
Characteristics
TA = O·Cto 70·C Vee= 5.0V ± 10% GND = OV
·118
 Output Loading Test Circuits
 8293
Waveforms
 8294
 8295
·122
 ====J
123
 UPI·41A Features Enhancements
 Signal Description
Mnemonic Description Bytes Cycles
Data Moves
 8041 Al8641 Al8741 a
 VIU
IU1
 Read OPERATION-DATA BUS Buffer Register
Input and Output Waveforms for A.C. Tests
Typical 8041/8741A Current
Write OPERATION-DATA BUS Buffer Register
 CHARACTERISTICS-PORT
CHARACTERISTICS-DMA
WAVEFORMS-DMA
 PROGRAMMING, VERIFYING, and Erasing the 8741A Eprom
VOO
 Timing Specification for Programming
Specification for Programming
Vdol
 Program
8041Al8641 Al8741A
 Support Products
Page
 Microcomputer Development System
Credit
 MODEL225 Functional Description
10-2
 Peripheral Interface
InterMODEL225 System Components
Integral CRT
Control
 Specifications
 9800556
Notavailable on bus
110V, 60 Hz 5.9 Amp 220V, 50 Hz 3.0 Amp
9800292
Page
 Intellec Prompt MCS·48 Microcomputer Design AID
 Intellec Prompt Features
Single Component Compu.ter
 Prompt 48 Commands and Functions
Intellec Prompt
 Intellec Prompt Functional Description
MCS-48 Processors
 User Interrupt causes an Interrupt only If
Prompt system Is running a user program
Cycle Time tCY = 2.5,..s Clock 6 MHz ± 0.1%
 Ordering Information
 MCS·48 IN·CIRCUIT Emulator
 ~ L ·
ICE·49
 Memory Mapping
GO from .START Till XDATA. Rslt Written
 ICE·49
ISIS·II
 EM1 Emulation Board
 EM1
 Ordering Information
EM1 Specifications
DC Power Vcc5V ±5% Icc 300 mA max
MDS·EM1
 EM2 Emulation Board
 ANO
40·PIN Socket Configuration EM2 Block Diagram
EM2
AN1
 EM2
UPP-1P3
MDS-EM2
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