87C51FA 87C51FB 87C51FC 87C51FC-20
CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
Automotive
Y
Y
FX Core Architecture Device
Extended Automotive Temperature
Range (
b
40 C to
a
125 C Ambient)
Available in 12 MHz 16 MHz and
20 MHz Versions
High Performance CHMOS EPROM
Three 16-Bit Timer Counters
Timer 2 (Up Down Counter)
Programmable Counter Array with
High Speed Output
Compare Capture
Pulse Width Modulator
Watchdog Timer Capabilities
One-to-Three Level Program Lock
System on EPROM
8K On-Chip User Programmable
EPROM in 87C51FA
16K On-Chip User Programmable
EPROM in 87C51FB
32K On-Chip User Programmable
EPROM in 87C51FC
256 Bytes of On-Chip Data RAM
Y
Y
Y
Y
Y
Quick Pulse Programming Algorithm
Boolean Processor
32 Programmable I O Lines
7 Interrupt Sources
Four Level Interrupt Priority
Programmable Serial Channel with
Framing Error Detection
Automatic Address Recognition
TTL and CMOS Compatible Logic
Levels
64K External Program Memory Space
64K External Data Memory Space
MCS -51 Fully Compatible Instruction
Set
Power Saving Idle and Power Down
Modes
ONCE (On-Circuit Emulation) Mode
RFI Reduction Mode
Available in PLCC and PDIP Packages
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
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 87C51FA 87C51FB 87C51FC 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 87C51FB 87C51FC
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 I O and up down 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
87C51FA FB FC
Other brands and names are the property of their respective owners
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
COPYRIGHT
INTEL CORPORATION 1995
September 1993
Order Number 270961-003
INTEL [ INTEL CORPORATION ]
