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AT89C51ED2-RDTUM Datasheet(PDF) 1 Page - ATMEL Corporation |
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AT89C51ED2-RDTUM Datasheet(HTML) 1 Page - ATMEL Corporation |
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1 / 137 page  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 – 9 Interrupt Sources with 4 Priority Levels • Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply • ISP (In-System Programming) Using Standard V CC Power Supply • 2048 Bytes 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 (AT89C51ED2 Only) • 100K Write Cycles • Dual Data Pointer • Variable Length MOVX for Slow RAM/Peripherals • Improved X2 Mode with Independent Selection for CPU and Each Peripheral • Keyboard Interrupt Interface on Port 1 • SPI Interface (Master/Slave Mode) • 8-bit Clock Prescaler • 16-bit Programmable Counter Array – 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 • Single Range Power Supply: 2.7V to 5.5V • Industrial Temperature Range (-40 to +85°C) • Packages: PLCC44, VQFP44, PLCC68, VQFP64 8-bit Flash Microcontroller AT89C51RD2 AT89C51ED2 |
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