P87C42

MCU 8Bit UPI-C42 CISC 4KB EPROM 5V 40Pin PDIP

UNIVERSAL PERIPHERAL INTERFACE CHMOS 8-BIT SLAVE MICROCONTROLLER

The UPI-C42 is an enhanced CHMOS version of the industry standard UPI-42 family. It is fabricated on Intel"s CHMOS III-E process. The UPI-C42 is pin, software, and architecturally compatible with the NMOS UPI family. The UPI-C42 has all of the same features of the NMOS family plus a larger user programmable memory array 4K, hardware A20 gate support, and lower power consumption inherent to a CHMOS product.

The UPI-L42 offers the same functionality and socket compatibility as the UPI-C42 as well as providing low voltage 3.3V operation.

The UPI-C42 is essentially a ``slave"" microcontroller, or a microcontroller 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.

Pin, Software and Architecturally Compatible with all UPI-41 and UPI-42 Products

Low Voltage Operation with the UPI-L42

\- Full 3.3V Support

Hardware A20 Gate Support

Suspend Power Down Mode

Security Bit Code Protection Support

8-Bit CPU plus ROM/OTP EPROM, RAM, /O, Timer/Counter and Clock in a Single Package

4096 x 8 ROM/OTP, 256 x 8 RAM 8-Bit Timer/Counter, 18 Programmable I/O Pins

DMA, Interrupt, or Polled Operation Supported

One 8-Bit Status and Two Data Registers for Asynchronous Slave-to-Master Interface

Fully Compatible with all Intel and Most Other Microprocessor Families

Interchangeable ROM and OTP EPROM Versions

Expandable I/O

Sync Mode Available

Over 90 Instructions: 70% Single Byte

Quick Pulse Programming Algorithm

\- Fast OTP Programming

Available in 40-Lead Plastic, 44-Lead Plastic Leaded Chip Carrier, and 44-Lead Quad Flat Pack Packages