D8742 데이터 시트보기 (PDF) - Intel
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D8742 Datasheet PDF : 12 Pages
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8742
UNIVERSAL PERIPHERAL INTERFACE
8-BIT SLAVE MICROCONTROLLER
Y 8742 12 MHz
Y Pin Software and Architecturally
Compatible with 8741A
Y 8-Bit CPU plus ROM RAM I O Timer
and Clock in a Single Package
Y 2048 x 8 EPROM 128 x 8 RAM 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 Expandable I O
Y RAM Power-Down Capability
Y Over 90 Instructions 70% Single Byte
Y Available in EXPRESS
Standard Temperature Range
The Intel 8742 is a general-purpose Universal Peripheral Interface that allows designers to grow their own
customized solution for peripheral device control It contains a low-cost microcomputer with 2K of program
memory 128 bytes of data memory 8-bit timer counter and clock generator in a single 40-pin package
Interface registers are included to enable the UPI device to function as a peripheral controller in the MCS -48
MCS-51 MCS-80 MCS-85 8088 8086 and other 8- 16-bit systems
The 8742 is software pin and architecturally compatible with the 8741A The 8742 doubles the on-chip
memory space to allow for additional features and performance to be incorporated in upgraded 8741A de-
signs For new designs the additional memory and performance of the 8742 extends the UPI concept to more
complex motor control tasks 80-column printers and process control applications as examples
November 1991
Figure 1 Pin Configuration
290256 – 2
Order Number 290256-001
1
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