T89C51RB2 Datasheet | Atmel

Features - 80C52 patible - 8051 Pin and Instruction patible - Four 8-bit I/O Ports - Three 16-bit timer/counters - 256 Bytes Scratch Pad RAM - 10 Interrupt Sources with 4 Priority Levels - Dual Data Pointer Variable Length MOVX for slow RAM/Peripherals ISP (In-System Programming) using Standard VCC Power Supply Boot ROM Contains Low Level FLASH Programming Routines and a Default Serial Loader High-Speed Architecture - 40 MHz in Standard Mode - 20 MHz in X2 Mode (6 clocks/machine cycle) 16K/32K Bytes on-chip FLASH Program/Data Memory - Byte and Page (128 Bytes) Erase and Write - 10k Write Cycles On-chip 1024 Bytes Expanded RAM (XRAM) - Software Selectable Size (0, 256, 512, 768, 1024 bytes) - 256 Bytes Selected at Reset for TS87C51RB2/RC2 patibility Keyboard Interrupt Interface on port P1 SPI Interface (Master / Slave Mode) 8-bit Clock Prescaler Improved X2 Mode with Independent Selection for CPU and each Peripheral Programmable Counter Array 5 Channels with: - High Speed Output - pare / Capture - Pulse Width Modulator .. - Watchdog Timer Capabilities Asynchronous Port Reset Full Duplex Enhanced UART Dedicated Baud Rate Generator for UART Low EMI (Inhibit ALE) Hardware Watchdog Timer (One-time enabled with Reset-Out) Power Control Modes: - Idle Mode - Power-down mode - Power-off Flag Power supply: 4.5 to 5.5V or 2.7 to 3.6V Temperature ranges: mercial (0 to +70°C) and Industrial (-40 °C to +85°C) Packages: PDIL40, PLCC44, VQFP44 - - - - - - - - - - - 8-bit Microcontroller with 16K/ 32K byte Flash T89C51RB2 T89C51RC2 Preliminary - - - - - -...