Microchip AT80C51RD2-SLRUM 8-Bit Microcontroller: Data Sheet and Technical Overview

The Microchip AT80C51RD2-SLRUM is a high-performance, 8-bit microcontroller that stands as a significant evolution within the classic MCS-51 architecture. Engineered for applications demanding robust performance, enhanced memory, and low power consumption, this microcontroller is a versatile solution for a wide array of embedded systems, from industrial automation to consumer electronics.

Core Architecture and Performance

At its heart, the device features an 80C51 core operating at up to 60 MHz, delivering a substantial boost in processing power compared to its predecessors. This core retains the industry-standard instruction set, ensuring full compatibility with a vast ecosystem of existing code and development tools. The six-clock-per-machine-cycle mode can be selected, doubling the speed of standard 80C51 devices for performance-critical tasks, while a legacy 12-clock mode maintains timing compatibility.

Advanced Memory Configuration

A defining feature of the AT80C51RD2 is its expansive and flexible memory architecture. It integrates 64 KB of In-System Programmable (ISP) Flash memory for non-volatile code storage, supporting parallel programming for high-volume production and a convenient ISP interface for field updates. Additionally, it boasts 2048 bytes of on-chip RAM and an ingenious 1792 bytes of expanded RAM (XRAM), providing ample space for complex variables and data buffers. A key innovation is its Programmable Counter Array (PCA), which integrates multiple timer/capture modules. This unit supports functions like high-speed output, pulse width modulation (PWM), and watchdog timers, offloading timing-critical tasks from the CPU and simplifying design.

Robust Peripherals and Connectivity

The microcontroller is equipped with a comprehensive set of peripherals designed to reduce external component count and total system cost. Key features include:

Full-duplex Enhanced UART with automatic address recognition, facilitating robust multi-processor communication.

Three 16-bit timer/counters for precise timing and event counting operations.

A 10-bit analog-to-digital converter (ADC) with 8 input channels, enabling direct interfacing with analog sensors.

Low EMI design features, including an ALE disable function, to minimize electromagnetic interference in sensitive environments.

Power Management and Packaging

The device is designed for power-sensitive applications, supporting Idle and Power-down modes. In Power-down mode, power consumption is reduced to a minimum, preserving RAM content and allowing wake-up via external interrupts or a hardware reset. The "SLRUM" suffix denotes a specific package type—a 68-pin PLCC (Plastic Leaded Chip Carrier)—offering a compact footprint and reliable connectivity for surface-mount assembly.

ICGOOODFIND

The Microchip AT80C51RD2-SLRUM presents a powerful and feature-rich upgrade path for the enduring 8-bit 80C51 architecture. Its blend of high-speed performance, extensive memory options, and a rich integrated peripheral set makes it an exceptionally capable controller. For engineers developing next-generation products that require a balance of processing power, connectivity, and energy efficiency within a proven and reliable platform, this microcontroller remains a compelling and highly competitive choice.

Keywords:

1. 8-Bit Microcontroller

2. In-System Programmable (ISP) Flash

3. Programmable Counter Array (PCA)

4. Low Power Consumption

5. MCS-51 Architecture