T89C51RB2

Features 80C52 Compatible – 8051 Pin and Instruction Compatible – 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 Compatibility 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 – Compare / Capture – Pulse Width Modulator www.DataSheet4U.com – 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: Commercial (0 to +70°C) and Industrial (-40 °C to +85°C) Packages: PDIL40, PLCC44, VQFP44 ...