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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.
November 1994COPYRIGHT ' INTEL CORPORATION, 1995 Order Number: 272337-002
8XC51GB
CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
Commercial/Express
87C51GB—8 Kbytes OTP/8 Kbytes Internal Program Memory
83C51GB—8 Kbytes Factory Programmable ROM
80C51GB—CPU with RAM and I/O
8XC51GB—3.5 MHz to 12 MHz g20% V
CC
8XC51GB-1—3.5 MHz to 16 MHz g20% V
CC
Y
8 Kbytes On-Chip ROM/OTP ROM
Y
256 Bytes of On-Chip Data RAM
Y
Two Programmable Counter Arrays
with:
— 2 x 5 High Speed Input/Output
Channels Compare/Capture
— Pulse Width Modulators
— Watchdog Timer Capabilities
Y
Three 16-Bit Timer/Counters with
— Four Programmable Modes:
— Capture, Baud Rate Generation
(Timer 2)
Y
Dedicated Watchdog Timer
Y
8-Bit, 8-Channel A/D with:
— Eight 8-Bit Result Registers
— Four Programmable Modes
Y
Programmable Serial Channel with:
— Framing Error Detection
— Automatic Address Recognition
Y
Serial Expansion Port
Y
Programmable Clock Out
Y
Extended Temperature Range:
(
b
40§Cto
a
85§C)
Y
48 Programmable I/O Lines with
40 Schmitt Trigger Inputs
Y
15 Interrupt Sources with:
— 7 External, 8 Internal Sources
— 4 Programmable Priority Levels
Y
Pre-Determined Port States on Reset
Y
High Performance CHMOS Process
Y
TTL and CHMOS Compatible Logic
Levels
Y
Power Saving Modes
Y
64K External Data Memory Space
Y
64K External Program Memory Space
Y
Three Level Program Lock System
Y
ONCE (ON-Circuit Emulation) Mode
Y
Quick Pulse Programming Algorithm
Y
MCS 51 Microcontroller Fully
Compatible Instruction Set
Y
Boolean Processor
Y
Oscillator Fail Detect
Y
Available in 68-Pin PLCC
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.