This document is about the specification of 80C652/83C652 microcontrollers, including product functions, pin descriptions, register descriptions, etc.
The 80C652/83C652 are CMOS single‑chip 8‑bit microcontrollers compatible with the 80C51 instruction set. Three variants exist: the 83C652 with 8 KB mask‑programmable ROM, the ROM‑less 80C652, and the EPROM version (87C652). The devices include on‑chip UART, I²C‑like I²C‑bus, timers, and power‑control modes.
The document contains detailed product specifications, pin‑out tables, block diagrams, special‑function register listings, and ordering information for multiple package types such as plastic dual‑in‑line, leaded chip carrier, and quad flat pack. It also lists temperature ranges, frequency limits, and expansion capabilities.
| ROM size | 8 KB (expandable to 64 KB) |
|---|---|
| RAM size | 256 bytes (expandable to 64 KB) |
| I/O ports | Four 8‑bit ports |
| Timers | Two standard 16‑bit timer/counters |
| UART | Full‑duplex UART |
| Frequency range | 1.2 MHz to 24 MHz |
| Operating temperature ranges | -40 °C to +70 °C, -40 °C to +85 °C, -40 °C to +125 °C |
| Package types | Plastic DIL, Plastic Leaded Chip Carrier, Plastic Quad Flat Pack |
The device provides 8 KB of ROM (expandable to 64 KB) and 256 bytes of RAM (expandable to 64 KB).
It operates from 1.2 MHz up to 24 MHz.
Packages include Plastic Dual‑In‑Line Package, Plastic Leaded Chip Carrier, and Plastic Quad Flat Pack.
The microcontroller is rated for –40 °C to +70 °C, –40 °C to +85 °C, and –40 °C to +125 °C.