ATMEL AT89S2051-24SU 8-bit Microcontroller, 2KB Flash, 24MHz, 20-Pin SOIC

The ATMEL AT89S2051-24SU is a low-voltage, high-performance 8-bit CMOS microcontroller, engineered to deliver a highly flexible and powerful solution for a vast array of embedded control applications. It integrates 2KB of In-System Programmable (ISP) Flash memory, manufactured using high-density non-volatile technology, and is fully compatible with the industry-standard MCS-51 instruction set. This monolithic chip combines a versatile 8-bit CPU with on-board Flash, providing an efficient and compact core for your designs.

Designed with static logic for operation down to zero frequency, it supports two software-selectable power-saving modes to maximise energy efficiency. The Idle mode halts the CPU while allowing the RAM, timers, serial port, and interrupt system to remain active. The Power-down mode preserves RAM contents but freezes all other chip functions until the next external interrupt or hardware reset, making it ideal for battery-powered or low-energy applications.

Key Features & Specifications

• Core & Memory: Features an 8-bit CPU core with 2KB of ISP Flash program memory and 256 x 8-bit of internal RAM.
• High Performance: Operates at a maximum frequency of 24MHz with fully static operation.
• Enhanced I/O & Peripherals: Offers 15 programmable I/O lines with direct LED drive outputs, two 16-bit timers/counters, and a programmable serial UART channel.
• Advanced Control: Includes an on-chip analog comparator with selectable interrupt, an 8-bit PWM (Pulse-Width Modulation) channel, and a four-level enhanced interrupt controller.
• Robust Communication: Supports an enhanced UART serial port with framing error detection and automatic address recognition, alongside an SPI interface for serial communication.
• Reliability Features: Incorporates brownout reset, an internal power-on reset, a power-off flag, and interrupt recovery from power-down mode for stable,<