8-bit Flash Microcontroller
Description
Features
• 80C52 Compatible – 8051 Instruction Compatible
– Four 8-bit I/O Ports (44 Pins Version)
– Three 16-bit Timer/Counters – 256 bytes Scratch Pad RAM
– 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
– 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) • 128K bytes On-chip Flash Program/Data Memory
– 128 bytes Page Write with auto-erase
– 100k Write Cycles • On-chip 8192 bytes Expanded RAM (XRAM)
– 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:
– High Speed Output
– Compare/Capture – Pulse Width Modulator
– 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
Description
AT89C51RE2 is a high performance CMOS Flash version of the 80C51 CMOS single chip 8-bit microcontroller.
It contains a 128 Kbytes Flash memory block for program.
The 128 Kbytes Flash memory can be programmed either i...
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