AT89C51ID2_0309 Datasheet, PDF (1/159 Pages) ATMEL Corporation – 8-bit Flash Microcontroller

Features
• 80C52 Compatible
– 8051 Instruction Compatible
– Six 8-bit I/O Ports (64 pins or 68 Pins Versions)
– Four 8-bit I/O Ports (44 Pins Version)
– Three 16-bit Timer/Counters
– 256 bytes Scratch Pad RAM
– 10 Interrupt Sources With 4 Priority Levels
• ISP (In-System Programming) Using Standard V_CC Power Supply
• Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply
• Boot ROM Contains Low Level Flash Programming Routines and a Default Serial
Loader
• High-speed Architecture
– In Standard Mode:
40 MHz (Vcc 2.7V to 5.5V, Both Internal and External Code Execution)
60 MHz (Vcc 4.5V to 5.5V and Internal Code Execution Only)
– In X2 Mode (6 Clocks/Machine Cycle)
20 MHz (Vcc 2.7V to 5.5V, Both Internal and External Code Execution)
30 MHz (Vcc 4.5V to 5.5V and Internal Code Execution Only)
• 64K bytes On-chip Flash Program/Data Memory
– Byte and Page (128 bytes) Erase and Write
– 100k Write Cycles
• On-chip 1792 bytes Expanded RAM (XRAM)
– Software Selectable Size (0, 256, 512, 768, 1024, 1792 bytes)
– 768 bytes Selected at Reset for T89C51RD2 Compatibility
• On-chip 2048 bytes EEPROM block for Data Storage
– 100k Write Cycles
• Dual Data Pointer
• 32 KHz Crystal Oscillator
• Variable Length MOVX for Slow RAM/Peripherals
• Improved X2 Mode with Independant Selection for CPU and Each Peripheral
• Keyboard Interrupt Interface on Port 1
• SPI Interface (Master/Slave Mode)
• 8-bit Clock Prescaler
• Two Wire Interface 400K bit/s
• Programmable Counter Array with:
– High Speed Output
– Compare/Capture
– Pulse Width Modulator
– Watchdog Timer Capabilities
• Asynchronous Port Reset
• Full Duplex Enhanced UART with Dedicated Internal Baud Rate Generator
• Low EMI (inhibit ALE)
• Hardware Watchdog Timer (One-time Enabled with Reset-Out), Power-Off Flag
• Power Control Modes: Idle Mode, Power-down Mode
• Power Supply: 2.7V to 5.5V
• Temperature Ranges: Industrial (-40 to +85°C)
• Packages: PLCC44, VQFP44, PLCC68⁽¹⁾, VQFP64⁽¹⁾
Note: 1. Contact Atmel Sales for availability.
8-bit Flash
Microcontroller
AT89C51ID2
Description
AT89C51ID2 is a high performance CMOS Flash version of the 80C51 CMOS single
chip 8-bit microcontroller. It contains a 64 Kbytes Flash memory block for program
and for data.
4289A–8051–09/03
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