The MCS 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
8052AH
8051AH
8032AH
8031AH
Internal Memory
Program
8K x 8 ROM
4K x 8 ROM
none
none
Data
256 x 8 RAM
128 x 8 RAM
256 x 8 RAM
128 x 8 RAM
Timers
Event Counters
3 x 16-Bit
2 x 16-Bit
3 x 16-Bit
2 x 16-Bit
Interrupts
6
5
6
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
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changes to these specifications at any time without notice Microcomputer Products may have minor variations to this specification known as errata
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