鈥?/div>
鈥?Endurance: 1,000 Write/Erase Cycles
Fully Static Operation: 0 Hz to 33 MHz
Three-Level Program Memory Lock
256 x 8-bit Internal RAM
32 Programmable I/O Lines
Three 16-bit Timer/Counters
Eight Interrupt Sources
Low Power Idle and Power Down Modes
Description
The AT89C55 is a low-power, high-performance CMOS 8-bit microcomputer with 20K
bytes of Flash programmable and erasable read only memory. The device is manu-
factured using Atmel鈥檚 high density nonvolatile memory technology and is compatible
with the industry standard 80C51 instruction set and pinout. The on-chip Flash allows
the program memory to be reprogrammed in-system or by a conventional nonvolatile
memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic
chip, the Atmel AT89C55 is a powerful microcomputer which provides a highly flexible
and cost effective solution to many embedded control applications.
(continued)
8-Bit
Microcontroller
with 20K Bytes
Flash
AT89C55
Pin Configurations
PDIP
PQFP/TQFP
PLCC
0580D-A鈥?2/97
4-169