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AT89C51RE2 Datasheet, PDF (1/187 Pages) ATMEL Corporation – 8-bit Flash Microcontroller | |||
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Features
⢠80C52 Compatible
â 8051 Instruction Compatible
â Four 8-bit I/O Ports (44 Pins Version)
â Three 16-bit Timer/Counters
â 256 bytes Scratch Pad RAM
â 11 Interrupt Sources With 4 Priority Levels
⢠ISP (In-System Programming) Using Standard VCC Power Supply
⢠Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply
⢠Boot ROM Contains Serial Loader for In-System Programming
⢠High-speed Architecture
â 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)
â 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)
⢠128K bytes On-chip Flash Program/Data Memory
â 128 bytes Page Write with auto-erase
â 100k Write Cycles
⢠On-chip 8192 bytes Expanded RAM (XRAM)
â Software Selectable Size (0, 256, 512, 768, 1024, 1792, 2048, 4096, 8192 bytes)
⢠Dual Data Pointer
⢠Extended stack pointer to 512 bytes
⢠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
⢠Programmable Counter Array with:
â High Speed Output
â Compare/Capture
â Pulse Width Modulator
â Watchdog Timer Capabilities
⢠Asynchronous Port Reset
⢠Two 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
8-bit Flash
Microcontroller
AT89C51RE2
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