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PDF 8741AH Data sheet ( Hoja de datos )
| Número de pieza | 8741AH | |
| Descripción | Universal Peripheral Interface 8-Bit Slave Microcontroller | |
| Fabricantes | Intel | |
| Logotipo |  |
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UPI-41AH 42AH
UNIVERSAL PERIPHERAL INTERFACE
8-BIT SLAVE MICROCONTROLLER
Y UPI-41 6 MHz UPI-42 12 5 MHz
Y Pin Software and Architecturally
Compatible with all UPI-41 and UPI-42
Products
Y 8-Bit CPU plus ROM OTP EPROM RAM
I O Timer Counter and Clock in a
Single Package
Y 2048 x 8 ROM OTP 256 x 8 RAM on
UPI-42 1024 x 8 ROM OTP 128 x 8
RAM on UPI-41 8-Bit Timer Counter 18
Programmable I O Pins
Y One 8-Bit Status and Two Data
Registers for Asynchronous Slave-to-
Master Interface
Y DMA Interrupt or Polled Operation
Supported
Y Fully Compatible with all Intel and Most
Other Microprocessor Families
Y Interchangeable ROM and OTP EPROM
Versions
Y Expandable I O
Y Sync Mode Available
Y Over 90 Instructions 70% Single Byte
Y Available in EXPRESS
Standard Temperature Range
Y inteligent Programming Algorithm
Fast OTP Programming
Y Available in 40-Lead Plastic and 44-
Lead Plastic Leaded Chip Carrier
Packages
(See Packaging Spec Order 240800-001)
Package Type P and N
The Intel UPI-41AH and UPI-42AH are general-purpose Universal Peripheral Interfaces that allow the designer
to develop customized solutions for peripheral device control
They are essentially ‘‘slave’’ microcontrollers or microcontrollers with a slave interface included on the chip
Interface registers are included to enable the UPI device to function as a slave peripheral controller in the MCS
Modules and iAPX family as well as other 8- 16- and 32-bit systems
To allow full user flexibility the program memory is available in ROM and One-Time Programmable EPROM
(OTP) All UPI-41AH and UPI-42AH devices are fully pin compatible for easy transition from prototype to
production level designs
210393 – 2
Figure 1 DIP Pin Configuration
November 1994
210393 – 3
Figure 2 PLCC Pin Configuration
Order Number 210393-008
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1 page  
5 P26 and P27 are port pins or DMA handshake pins
for use with a DMA controller These pins default
to port pins on Reset
If the ‘‘EN DMA’’ instruction has been executed
P26 becomes the DRQ (DMA Request) pin A ‘‘1’’
written to P26 causes a DMA request (DRQ is acti-
vated) DRQ is deactivated by DACKRD
DACKWR or execution of the ‘‘EN DMA’’ in-
struction
If ‘‘EN DMA’’ has been executed P27 becomes
the DACK (DMA ACKnowledge) pin This pin acts
as a chip select input for the Data Bus Buffer reg-
isters during DMA transfers
UPI-41AH 42AH
210393 – 8
Figure 5 8088-UPI-41AH 42AH Interface
210393 – 7
DMA Handshake Capability
EN DMA Op Code 0E5H
1 110010 1
D7 D0
6 When EA is enabled on the UPI the program
counter is placed on Port 1 and the lower three
bits of Port 2 (MSB e P22 LSB e P10) On the
UPI this information is multiplexed with PORT
DATA (see port timing diagrams at end of this
data sheet)
7 The 8741AH and 8742AH support the inteligent
Programming Algorithm (See the Programming
Section )
210393 – 10
Figure 6 8048H-UPI-41 42 Interface
APPLICATIONS
210393 – 9
Figure 7 UPI-41 42-8243 Keyboard Scanner
Figure 4 UPI-41AH 42AH Keyboard Controller
210393 – 30
5
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5 Page 
UPI-41AH 42AH
ACCESS CODE
The following table summarizes the access codes required to invoke the Sync Mode Signature Mode
and the Security Bit respectively Also the programming and verification modes are included for
comparison
Modes
Control Signals
Data Bus
Port 2
Access Code
Port 1
Programming
Mode
Verification
Mode
Sync Mode
T0 RST SS EA PROG VDD VCC 0 1 2 3 4 5 6 7 0 1 2 0 1 2 3 4 5 6 7
0 0 1 HV 1 VDDH VCC
Address
Addr a0 a1 X X X X X X
0 1 1 HV STB VDDH VCC
Data In
Addr
0 0 1 HV 1 VCC VCC
Address
Addr a0 a1 X X X X X X
1 1 1 HV 1 VCC VCC
Data Out
Addr
STB 0 HV 0 X VCC VCC X X X X X X X X X X X X X X X X X X X
High
Signature Prog
Mode
Verify
Security Prog
Bit Byte
Verify
0
0
0
1
0
0
0
1
0 1 HV 1 VDDH VCC
1 1 HV STB VDDH VCC
0 1 HV 1 VCC VCC
1 1 HV 1 VCC VCC
0 1 HV 1 VDDH VCC
1 1 HV STB VDDH VCC
0 1 HV 1 VCC VCC
1 1 HV 1 VCC VCC
Addr (see Sig Mode Table)
Data In
Addr (see Sig Mode Table)
Data Out
Address
Data In
Address
Data Out
0 0 0 0 1 1 1 1 XX1
000
000
000
000
000
000
000
NOTES
1 a0 e 0 or 1 a1 e 0 or 1 a0 must e a1
ABSOLUTE MAXIMUM RATINGS
Ambient Temperature Under Bias 0 C to a70 C
Storage Temperature
b65 C to a150 C
Voltage on Any Pin with
Respect to Ground
b0 5V to a7V
Power Dissipation
15W
NOTICE This is a production data sheet The specifi-
cations are subject to change without notice
WARNING Stressing the device beyond the ‘‘Absolute
Maximum Ratings’’ may cause permanent damage
These are stress ratings only Operation beyond the
‘‘Operating Conditions’’ is not recommended and ex-
tended exposure beyond the ‘‘Operating Conditions’’
may affect device reliability
D C CHARACTERISTICS TA e 0 C to a70 C VCC e VDD e a5V g10%
Symbol
Parameter
UPI-41AH 42AH
Min Max
VIL
VIL1
VIH
VIH1
VIH2
VOL
Input Low Voltage (Except XTAL1 XTAL2 RESET)
Input Low Voltage (XTAL1 XTAL2 RESET)
Input High Voltage (Except XTAL1 XTAL2 RESET)
Input High Voltage (XTAL1 RESET)
Input High Voltage (XTAL2)
Output Low Voltage (D0 – D7)
b0 5
b0 5
20
35
22
08
06
VCC
VCC
VCC
0 45
Units
Notes
V
V
V
V
V
V IOL e 2 0 mA
11
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11 Page | ||
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