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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

September 1993

COPYRIGHT

INTEL CORPORATION 1995

Order Number 270961-003

87C51FA87C51FB87C51FC87C51FC-20

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

Automotive

Y

FX Core Architecture Device

Y

Extended Automotive Temperature

Y

Available in 12 MHz 16 MHz and

20 MHz Versions

Y

High Performance CHMOS EPROM

Y

Three 16-Bit TimerCounters

Timer 2 (UpDown Counter)

Y

Programmable Counter Array with

High Speed Output

CompareCapture

Pulse Width Modulator

Watchdog Timer Capabilities

Y

One-to-Three Level Program Lock

System on EPROM

Y

8K On-Chip User Programmable

EPROM in 87C51FA

Y

16K On-Chip User Programmable

EPROM in 87C51FB

Y

32K On-Chip User Programmable

EPROM in 87C51FC

Y

256 Bytes of On-Chip Data RAM

Y

Quick Pulse Programming Algorithm

Y

Boolean Processor

Y

32 Programmable IO Lines

Y

7 Interrupt Sources

Y

Four Level Interrupt Priority

Y

Programmable Serial Channel with

Framing Error Detection

Automatic Address Recognition

Y

TTL and CMOS Compatible Logic

Levels

Y

64K External Program Memory Space

Y

64K External Data Memory Space

Y

MCS -51 Fully Compatible Instruction

Set

Y

Power Saving Idle and Power Down

Modes

Y

ONCE (On-Circuit Emulation) Mode

Y

RFI Reduction Mode

Y

Available in PLCC and PDIP Packages

MEMORY ORGANIZATION

PROGRAM MEMORY Up to 8 Kbytes of the program memory can reside in the 87C51FA On-Chip EPROM

Up to 16 Kbytes of the program memory can reside in the 87C51FB on-chip EPROM Up to 32 Kbytes of the

program memory can reside in the 87C51FC on-chip EPROM In addition the device can address up to 64K of

program memory external to the chip

DATA MEMORY This microcontroller has a 256 x 8 on-chip RAM In addition it can address up to 64 Kbytes of

external data memory

The Intel 87C51FA87C51FB87C51FC is a single-chip control-oriented microcontroller which is fabricated on

Intel’s reliable CHMOS EPROM technology Being a member of the MCS-51 family the 87C51FB87C51FC

uses the same powerful instruction set has the same architecture and is pin-for-pin compatible with the

existing MCS-51 family of products The 87C51FA is an enhanced version of the 87C51 The 87C51FB is an

enhanced version of the 87C51FA The 87C51FC is an enhanced version of the 87C51FB With 8 Kbytes of

program memory in the 87C51FA and 16 Kbytes of program memory in the 87C51FB and 32 Kbytes of

program memory in the 87C51FC it is an even more powerful microcontroller for applications that require

Pulse Width Modulation High Speed IO and updown counting capabilities such as brake and traction

control

For the remainder of this document the 87F51FA 87C51FB and 87C51FC will be referred to as the

87C51FAFBFC