1. Features 80C52 Compatible 8051 pin and instruction compatible Four 8-bit I/O ports Three 16-bit timer/counters 256 bytes scratchpad RAM High-Speed Architecture 40 MHz 5V, 30MHz 3V X2 Speed Improvement capability (6 clocks/machine cycle) High 30 MHz 5V, 20 MHz 3V (Equivalent to 60 MHz 5V, 40 MHz 3V) Performance Dual Data Pointer On-chip ROM/EPROM (16K-bytes, 32K-bytes, 64K-bytes) 8-bit On-chip eXpanded RAM (XRAM) (256 or 768 bytes) Programmable Clock Out and Up/Down Timer/Counter 2 Microcontroller Programmable Counter Array with High Speed Output, Compare / Capture, TS80C51RA2 Pulse Width Modulator, Watchdog Timer Capabilities TS83C51RB2 Hardware Watchdog Timer (One-time enabled with Reset-Out) 2 extra 8-bit I/O ports available on RD2 with high pin count packages TS83C51RC2 Asynchronous port reset Interrupt Structure with TS83C51RD2 7 Interrupt sources, 4 level priority interrupt system TS87C51RB2 Full duplex Enhanced UART Framing error detection TS87C51RC2 Automatic address recognition TS87C51RD2 Low EMI (inhibit ALE) Power Control modes AT80C51RA2 Idle mode Power-down mode AT83C51RB2 Power-off Flag Once mode (On-chip Emulation) AT83C51RC2 Power supply: 4.5-5V, 2.7-5.5V o o Temperature ranges: Commercial (0 to 70 C) and Industrial (-40 to 85 C) AT83C51RD2 Packages: PDIL40, PLCC44, VQFP44 1.4, PLCC68, VQFP64 1.4 AT87C51RB2 2. Description AT87C51RC2 Atmel TS8xC51Rx2 is a high performance CMOS ROM, OTP, EPROM and ROMless versions of the 80C51 CMOS single chip 8-bit microcontroller. The TS8xC51Rx2 retains all features of the 80C51 with extended ROM/EPROM capacity (16/32/64 Kbytes), 256 bytes of internal RAM, a 7-source , 4-level interrupt system, an on-chip oscilator and three timer/counters. In addition, the TS80C51Rx2 has a Programmable Counter Array, an XRAM of 256 or 768 bytes, a Hardware Watchdog Timer, a more versatile serial channel that Rev. 4188F805101/08facilitates multiprocessor communication (EUART) and an X2 speed improvement mechanism. The fully static design of the TS80C51Rx2 allows to reduce system power consumption by bringing the clock frequency down to any value, even DC, without loss of data. The TS80C51Rx2 has 2 software-selectable modes of reduced activity for further reduction in power consumption. In the idle mode the CPU is frozen while the timers, the serial port and the interrupt system are still operating. In the power-down mode the RAM is saved and all other functions are inoperative. PDIL40 PLCC44 TOTAL RAM VQFP44 1.4 ROM (bytes) EPROM (bytes) XRAM (bytes) (bytes) I/O TS80C51RA2 0 0 256 512 32 TS80C51RD2 0 0 768 1024 32 TS83C51RB2 16k 0 256 512 32 TS83C51RC2 32k 0 256 512 32 TS83C51RD2 64k 0 768 1024 32 TS87C51RB2 0 16k 256 512 32 TS87C51RC2 0 32k 256 512 32 TS87C51RD2 0 64k 768 1024 32 PLCC68 TOTAL RAM VQFP64 1.4 ROM (bytes) EPROM (bytes) XRAM (bytes) (bytes) I/O TS80C51RD2 0 0 768 1024 48 TS83C51RD2 64k 0 768 1024 48 TS87C51RD2 0 64k 768 1024 48 2 AT/TS8xC51Rx2 4188F805101/08