8XC51RA/RB/RC
CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
Commercial/Express
87C51RA/83C51RA/80C51RA/87C51RB/83C51RB/87C51RC/83C51RC
*See Table 1 for Proliferation Options
Y
Y
High Performance CHMOS EPROM/
ROM/CPU
6 Interrupt Sources
Y
Y
Programmable Serial Channel with:
Ð Framing Error Detection
Ð Automatic Address Recognition
Y
Y
Y
24 MHz Operation
512 Bytes of On-Chip Data RAM
TTL and CMOS Compatible Logic
Levels
Dedicated Hardware Watchdog Timer
(One-Time Enabled with Reset-Out)
Y
Y
Y
Y
64K External Program Memory Space
64K External Data Memory Space
Y
Y
Y
Y
Y
Y
Three 16-Bit Timer/Counters
Programmable Clock Out
MCS 51 Compatible Instruction Set
É
Power Saving Idle and Power Down
Modes
Up/Down Timer/Counter
Three Level Program Lock System
8K/16K/32K On-Chip Program Memory
Y
Y
Y
ONCE (On-Circuit Emulation) Mode
Four-Level Interrupt Priority
Improved Quick Pulse Programming
Algorithm
Extended Temperature Range
b
Y
Y
Boolean Processor
a
40 C to 85 C)
(
§
§
32 Programmable I/O Lines
MEMORY ORGANIZATION
ROMless
Device
ROM
EPROM
ROM/EPROM
Bytes
RAM
Device
Version
87C51RA
87C51RB
87C51RC
Bytes
80C51RA
80C51RA
80C51RA
83C51RA
83C51RB
83C51RC
8K
16K
32K
512
512
512
These devices can address up to 64 Kbytes of external program/data memory.
The Intel 8XC51RA/8XC51RB/8XC51RC is a single-chip control-oriented microcontroller which is fabricated
on Intel’s reliable CHMOS III-E technology. Being a member of the MCS 51 family of controllers, the
8XC51RA/8XC51RB/8XC51RC 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 8XC51RA/8XC51RB/8XC51RC is an
enhanced version of the 8XC52/8XC54/8XC58. The added features make it an even more powerful microcon-
troller for applications that require 512 bytes of on-chip data RAM and dedicated hardware WatchDog Timer
with reset-out features.
Throughout this document 8XC51RX will refer to the 8XC51RA, 8XC51RB and 8XC51RC unless information
applies to a specific device.
For a detailed description of 8XC51RA/RB/RC, refer to the 8XC51RA/RB/RC Hardware Description, order
number 272668.
*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
INTELCORPORATION, 2004
July 2004
Order Number: 272659-003