The 8051 Microcontroller and Embedded

(lily) #1
Department of Computer Scien

ce and Information Engineering

National Cheng Kung University, TAIWAN
HANEL

OVERVIEW OF 8051 FAMILY8051 Family


‰The 8051 is a subset of the 8052‰The 8031 is a ROM-less 8051


¾Add external ROM to it¾You lose two ports, and leave only 2 ports for I/O operations


6
8
6

Interrupt sources


1
1
1

Serial port


32
32
32

I/O pins


2
3
2

Timers


128
256
128

RAM (bytes)


0K
8K
4K

ROM (on-chip program space in bytes)


8031
8052
8051

Feature

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