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MCBx51 User's Guide
Introduction Setup 
Theory of Operation 
Block Diagram Schematics Technical Data Prototyping Area Microcontroller RAM EPROM Page Mode Power Supply Configuration LEDs Push Buttons Serial Ports Address Decoding 251 Devices 8051 DevicesTechnical Data
| Parameter | Description |
|---|---|
| Supply Voltage | 8V - 12V DC |
| Supply Current | 300 mA typical |
| XTAL Frequency | 12 MHz (allows up to a 24 MHz CPU clock) |
| Memory | 256 Kbytes RAM 128 Kbytes Monitor EPROM (optional:256 Kbytes User EPROM) |
| Microcontroller | Intel 80C251SB or Atmel AT/TSC80251G1D/G2D Classic 8051 devices, like 80C32, 8xC51FC Enhance 8051 devices like 8xC51Rx2, NXP 8xC664 Dallas 320/420/520 |
| Peripherals | 2 × RS232 Interfaces |
| Board Size | 100mm x 160mm (3.95" x 6.3"). |
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