Description

The 80C42 V1.04 is a universal peripheral interface CMOS 8-bit slave microcontroller. It is an enhanced version of the industry standard Intel UPI-42 family, fabricated on Intel's CMOS III-E process. The 80C42 V1.04 is pin, software, and architecturally compatible with the NMOS UPI family, and it offers the same features as the NMOS family along with a larger user programmable memory array (4K), hardware A20 gate support, and lower power consumption inherent to a CMOS product.

Specifications and features

• Pin, software, and architecturally compatible with all UPI-41 and UPI-42 products
• Low voltage operation with the UPI-L42, providing 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, I/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 for fast OTP programming
• Available in 40-Lead Plastic, 44-Lead Plastic Leaded Chip Carrier, and 44-Lead Quad Flat Pack Packages

Application Scenarios

The 80C42 V1.04 can be used as a slave microcontroller with a slave interface included on the chip. It is designed to function as a slave peripheral controller in the MCS Modules and iAPX family, as well as other 8-, 16-, and 32-bit systems. The program memory is available in ROM and One-Time Programmable EPROM (OTP) for user flexibility.

Comparison

• Enhanced CMOS version of the industry standard Intel UPI-42 family
• Pin, software, and architecturally compatible with the NMOS UPI family
• Larger user programmable memory array (4K)
• Hardware A20 gate support
• Lower power consumption inherent to a CMOS product
• Low voltage 3.3V operation with the UPI-L42

No significant disadvantages have been identified for the 80C42 V1.04 model.