8 Bit
Spread-
Spectrum
Microcontroller
Preliminary
Features
•
Compatible with MCS-51

Products
•
8K bytes of On-Board Program Memory
•
Fully Static Operation: 0 Hz to 16 MHz
•
256 x 8 Bit Internal RAM
•
32 Programmable I/O Lines
•
Three 16 Bit Timer/Counters
•
Eight Interrupt Sources
•
Programmable Serial Channel
•
Low Power Idle and Power Down Modes
Description
The AT48801 is a low-power, high-performance CMOS 8 bit microcomputer with 8K
bytes on-board program memory. The device is compatible with the industry standard
80C51 and 80C52 instruction set and pinout. The Atmel AT48801 is a powerful micro-
computer which provides a highly flexible and cost effective solution to spread-spec-
trum applications.
The AT48801 provides the following standard features: 8K bytes of program memory,
256-bytes of RAM, 32 I/O lines, three 16 bit timer/counters, a six-vector two-level
interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In
addition, the AT48801 is designed with static logic for operation down to zero fre-
quency and supports two software selectable power saving modes. The Idle Mode
stops the CPU while allowing the RAM, timer/counters, serial port, and interrupt sys-
tem to continue functioning. The Power Down Mode saves the RAM contents but
freezes the oscillator, disabling all other chip functions until the next hardware reset.
PQFP
Pin Configuration
0629A
AT48801
1-1