CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

The Intel 8XC51RA/8XC51RB/8XC51RC is a single-chip control-oriented microcontroller which is fabricated on Intel’s reliable CHMOS III-E technology. Being a member of the MCS 51 family of controllers, the 8XC51RA/8XC51RB/8XC51RC uses the same powerful instruction set, has the same architecture, and is pinfor-pin compatible with the existing MCS 51 family of products. The 8XC51RA/8XC51RB/8XC51RC is an enhanced version of the 8XC52/8XC54/8XC58. The added features make it an even more powerful microcontroller for applications that require 512 bytes of on-chip data RAM and dedicated hardware WatchDog Timer with reset-out features.
Throughout this document 8XC51RX will refer to the 8XC51RA, 8XC51RB and 8XC51RC unless information applies to a specific device.

■ High Performance CHMOS EPROM/ROM/CPU
■ 24 MHz Operation
■ 512 Bytes of On-Chip Data RAM
■ Dedicated Hardware Watchdog Timer (One-Time Enabled with Reset-Out)
■ Three 16-Bit Timer/Counters
■ Programmable Clock Out
■ Up/Down Timer/Counter
■ Three Level Program Lock System
■ 8K/16K/32K On-Chip Program Memory
■ Improved Quick Pulse Programming Algorithm
■ Boolean Processor
■ 32 Programmable I/O Lines
■ 6 Interrupt Sources
■ Programmable Serial Channel with:
   — Framing Error Detection
   — Automatic Address Recognition
■ TTL and CMOS Compatible Logic Levels
■ 64K External Program Memory Space
■ 64K External Data Memory Space
■ MCSÉ 51 Compatible Instruction Set
■ Power Saving Idle and Power Down Modes
■ ONCE (On-Circuit Emulation) Mode
■ Four-Level Interrupt Priority
■ Extended Temperature Range (-40°C to +85°C)