8XC51GB
CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
Commercial/Express
87C51GBÐ8 Kbytes OTP/8 Kbytes Internal Program Memory
83C51GBÐ8 Kbytes Factory Programmable ROM
80C51GBÐCPU with RAM and I/O
g
8XC51GBÐ3.5 MHz to 12 MHz 20% V
8XC51GB-1Ð3.5 MHz to 16 MHz 20% V
CC
g
CC
Y
Y
Y
Y
8 Kbytes On-Chip ROM/OTP ROM
256 Bytes of On-Chip Data RAM
48 Programmable I/O Lines with
40 Schmitt Trigger Inputs
Y
15 Interrupt Sources with:
Ð 7 External, 8 Internal Sources
Ð 4 Programmable Priority Levels
Two Programmable Counter Arrays
with:
Ð 2 x 5 High Speed Input/Output
Channels Compare/Capture
Ð Pulse Width Modulators
Ð Watchdog Timer Capabilities
Y
Y
Y
Pre-Determined Port States on Reset
High Performance CHMOS Process
TTL and CHMOS Compatible Logic
Levels
Y
Three 16-Bit Timer/Counters with
Ð Four Programmable Modes:
Ð Capture, Baud Rate Generation
(Timer 2)
Y
Y
Y
Y
Y
Y
Y
Power Saving Modes
64K External Data Memory Space
64K External Program Memory Space
Three Level Program Lock System
ONCE (ON-Circuit Emulation) Mode
Quick Pulse Programming Algorithm
Y
Y
Dedicated Watchdog Timer
8-Bit, 8-Channel A/D with:
Ð Eight 8-Bit Result Registers
Ð Four Programmable Modes
Y
Programmable Serial Channel with:
Ð Framing Error Detection
Ð Automatic Address Recognition
MCS 51 Microcontroller Fully
É
Compatible Instruction Set
Y
Y
Y
Y
Y
Y
Serial Expansion Port
Boolean Processor
Programmable Clock Out
Extended Temperature Range:
Oscillator Fail Detect
Available in 68-Pin PLCC
b
a
40 C to 85 C)
(
§
§
MEMORY ORGANIZATION
PROGRAM MEMORY: Up to 8 Kbytes of the program memory can reside in the on-chip ROM. Also, 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 8XC51GB is a single-chip control oriented microcontroller which is fabricated on Intel’s CHMOS III-E
technology. The 8XC51GB is an enhanced version of the 8XC51FA and uses the same powerful instruction
set and architecture as existing MCS 51 microcontroller products. Added features make it an even more
powerful microcontroller for applications that require On-Chip A/D, Pulse Width Modulation, High Speed I/O,
up/down counting capabilities and memory protection features. It also has a more versatile serial channel that
facilitates multi-processor communications.
*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
November 1994
Order Number: 272337-002