at89c4051-12sa ATMEL Corporation, at89c4051-12sa Datasheet

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at89c4051-12sa

Manufacturer Part Number
at89c4051-12sa
Description
8-bit Microcontroller With 4k Bytes Flash
Manufacturer
ATMEL Corporation
Datasheet
Features
Description
The AT89C4051 is a low-voltage, high-performance CMOS 8-bit microcomputer with
4K Bytes of Flash programmable and erasable read only memory (PEROM). The
device is manufactured using Atmel’s high density nonvolatile memory technology
and is compatible with the industry standard MCS-51™ instruction set. By combining
a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C4051 is a pow-
erful microcomputer which provides a highly flexible and cost effective solution to
many embedded control applications.
The AT89C4051 provides the following standard features: 4K Bytes of Flash, 128
bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five vector two-level interrupt
architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator
and clock circuitry. In addition, the AT89C4051 is designed with static logic for opera-
tion down to zero frequency and supports two software-selectable power saving
modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial
port and interrupt system 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.
Pin Configuration
Compatible with MCS-51™ Products
4K Bytes of Reprogrammable Flash Memory
3.0V to 6V Operating Range
Fully Static Operation: 0 Hz to 24 MHz
Two-Level Program Memory Lock
128 x 8-Bit Internal RAM
15 Programmable I/O Lines
Two 16-Bit Timer/Counters
Six Interrupt Sources
Programmable Serial UART Channel
Direct LED Drive Outputs
On-Chip Analog Comparator
Low Power Idle and Power Down Modes
Brown-Out Detection
– Endurance: 1,000 Write/Erase Cycles
/VPP
PDIP/SOIC
8-Bit
Microcontroller
with 4K Bytes
Flash
AT89C4051
Preliminary
Rev. 1001A–02/98
1

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