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AT89C51IC2_14 Datasheet, PDF (1/147 Pages) ATMEL Corporation – During UART Reception, Clearing REN may Generate Unexpected IT | |||
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Features
⢠80C52 Compatible
â 8051 Pin and Instruction Compatible
â Four 8-bit I/O ports + 2 I/O 2-wire Interface (TWI) Pins
â Three 16-bit Timer/Counters
â 256 bytes Scratch Pad RAM
â 10 Interrupt Sources with 4 Priority Levels
â 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
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)
â 32K Bytes On-chip Flash Program/Data Memory
â Byte and Page (128 Bytes) Erase and Write
â 100K Write Cycles
⢠On-chip 1024 Bytes Expanded RAM (XRAM)
â Software Selectable Size (0, 256, 512, 768, 1024 Bytes)
â 256 Bytes Selected at Reset for TS87C51RB2/RC2 Compatibility
⢠Keyboard Interrupt Interface on Port P1
⢠400-Kbits/s Multimaster 2-wire Interface
⢠SPI Interface (Master/Slave Mode)
⢠Sub-clock 32 kHz Crystal Oscillator
⢠8-bit clock Prescaler
⢠Improved X2 Mode With Independant Selection for CPU and Each Peripheral
⢠Programmable Counter Array 5 Channels with:
â High Speed Output
â Compare/Capture
â Pulse Width Modulator
â 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:
â Idle Mode
â Power-down Mode
â Power-Off Flag
⢠Power Supply:
â 2.7 to 3.6 (3V Version)
â 2.7 to 5.5V (5V Version)
⢠Temperature Ranges: Commercial (0 to +70°C) and Industrial (-40°C to +85°C)
⢠Packages: PLC44, VQFP44
8-bit Flash
Microcontroller
with 2-wire
Interface
AT89C51IC2
Rev. 4301Dâ8051â02/08
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