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Description

The AT89C4051 is a low-voltage, high-performance CMOS 8-bit microcontroller with 4K bytes of Flash programmable and erasable read-only memory. 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 powerful microcontroller 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 operation 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.

Features

? Compatible with MCS?51 Products

? 4K Bytes of Reprogrammable Flash Memory

– Endurance: 1,000 Write/Erase Cycles

? 2.7V 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

? Power-On Reset (POR)

? Green (Pb/Halide-free/RoHS Compliant) Packaging