*
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Information in this document is provided in connection with Intel products. Intel assumes no liability whatsoever, including infringement of any patent or
copyright, for sale and use of Intel products except as provided in Intel’s Terms and Conditions of Sale for such products. Intel retains the right to make
changes to these specifications at any time, without notice. Microcomputer Products may have minor variations to this specification known as errata.
December 1995
COPYRIGHT
©
INTEL CORPORATION, 1996
Order Number: 290414-003
UPI-C42/UPI-L42
UNIVERSAL PERIPHERAL INTERFACE
CHMOS 8-BIT SLAVE MICROCONTROLLER
Y
Pin, Software and Architecturally
Compatible with all UPI-41 and UPI-42
Products
Y
Low Voltage Operation with the UPI-
L42
Ð Full 3.3V Support
Y
Hardware A20 Gate Support
Y
Suspend Power Down Mode
Y
Security Bit Code Protection Support
Y
8-Bit CPU plus ROM/OTP EPROM, RAM,
I/O, Timer/Counter and Clock in a
Single Package
Y
4096 x 8 ROM/OTP, 256 x 8 RAM 8-Bit
Timer/Counter, 18 Programmable I/O
Pins
Y
DMA, Interrupt, or Polled Operation
Supported
Y
One 8-Bit Status and Two Data
Registers for Asynchronous Slave-to-
Master Interface
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
Quick Pulse Programming Algorithm
Ð Fast OTP Programming
Y
Available in 40-Lead Plastic, 44-Lead
Plastic Leaded Chip Carrier, and
44-Lead Quad Flat Pack Packages
(See Packaging Spec., Order
Ý
240800, Package Type P, N,
and S)
The UPI-C42 is an enhanced CHMOS version of the industry standard Intel 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).
290414 – 1
Figure 1. DIP Pin
Configuration
290414 – 2
Figure 2. PLCC Pin Configuration
290414 – 3
Figure 3. QFP Pin Configuration
