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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.
February 1995COPYRIGHT
©
INTEL CORPORATION, 1995 Order Number: 270499-006
8031AH/8051AH
8032AH/8052AH
MCS
É
51
NMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS
Automotive
Y
High Performance HMOS Process
Y
Internal Timers/Event Counters
Y
2-Level Interrupt Priority Structure
Y
32 I/O Lines (Four 8-Bit Ports)
Y
64K Program Memory Space
Y
Security Feature Protects EPROM Parts
Against Software Piracy
Y
Boolean Processor
Y
Bit-Addressable RAM
Y
Programmable Full Duplex Serial
Channel
Y
111 Instructions (64 Single-Cycle)
Y
64K Data Memory Space
Y
Available in PLCC and DIP Packages
The MCS
É
51 microcontroller products are optimized for control applications. Byte-processing and numerical
operations on small data structures are facilitated by a variety of fast addressing modes for accessing the
internal RAM. The instruction set provides a convenient menu of 8-bit arithmetic instructions, including multiply
and divide instructions. Extensive on-chip support is provided for one-bit variables as a separate data type,
allowing direct bit manipulation and testing in control and logic systems that require Boolean processing.
Device
Internal Memory Timers/
Interrupts
Program Data
Event Counters
8052AH 8K x 8 ROM 256 x 8 RAM 3 x 16-Bit 6
8051AH 4K x 8 ROM 128 x 8 RAM 2 x 16-Bit 5
8032AH none 256 x 8 RAM 3 x 16-Bit 6
8031AH none 128 x 8 RAM 2 x 16-Bit 5
NOTICE:
This datasheet contains information on products in full production. Specifications within this datasheet
are subject to change without notice. Verify with your local Intel sales office that you have the latest
datasheet before finalizing a design.