This document describes the features and characteristics of the Atmel TS8xC51Rx2 microcontroller, including 80C51 compatibility, high-speed architecture, dual data pointer, on-chip ROM/EPROM and expanded RAM, programmable clock and counters, etc.
The TS87C51RD2 is a high‑performance CMOS 8‑bit microcontroller compatible with the 8051 architecture. It offers up to 64 KB on‑chip ROM/EPROM, optional XRAM, three 16‑bit timer/counters, a full‑duplex enhanced UART, hardware watchdog timer and a programmable clock output. The device runs at up to 40 MHz (5 V) with an X2 speed‑improvement mode and supports power‑saving idle and power‑down modes.
The datasheet provides a block diagram, detailed SFR mapping, pin configuration tables and package options (PDIL40, PLCC44, VQFP44 1.4, PLCC68, VQFP64 1.4). Electrical specifications include a 4.5‑5 V (or 2.7‑5.5 V) supply range and temperature ratings from –40 °C to 85 °C for industrial use.
| CPU Frequency | 40 MHz @ 5 V, 30 MHz @ 3 V |
|---|---|
| Power Supply Voltage | 4.5‑5 V, 2.7‑5.5 V |
| Temperature Range | Commercial 0‑70 °C, Industrial –40‑85 °C |
| Package Types | PDIL40, PLCC44, VQFP44 1.4, PLCC68, VQFP64 1.4 |
| On‑Chip ROM/EPROM | 16 KB, 32 KB, 64 KB |
| On‑Chip XRAM | 256 bytes or 768 bytes |
| Interrupt Sources | 7 sources, 4‑level priority |
| UART | Full‑duplex Enhanced UART with framing error detection |
| Watchdog Timer | Hardware Watchdog Timer (One‑time enabled with Reset‑Out) |
It operates from 4.5 V to 5 V and also from 2.7 V to 5.5 V.
The device is rated for commercial use from 0 °C to 70 °C and for industrial use from –40 °C to 85 °C.
It is offered in PDIL40, PLCC44, VQFP44 1.4, PLCC68 and VQFP64 1.4 packages.
The maximum clock frequency is 40 MHz when powered at 5 V.