Professional IC Distribution & Technical Solutions

The P80C51BH is a microcontroller manufactured by Intel, part of the MCS-51 family. Below are its specifications, descriptions, and features:

Specifications:

• Architecture: 8-bit
• CPU Core: 8051
• Clock Speed: Up to 12 MHz
• Program Memory (ROM): 8 KB (mask-programmable)
• RAM (Internal Data Memory): 256 bytes
• I/O Ports: Four 8-bit ports (P0, P1, P2, P3)
• Timers/Counters: Two 16-bit (Timer 0 & Timer 1)
• Serial Communication: UART (Full-duplex)
• Interrupt Sources: 5 (2 external, 2 timer, 1 serial)
• Operating Voltage: 5V ±10%
• Package Options: 40-pin DIP, PLCC, LCC
• Operating Temperature Range: 0°C to 70°C (Commercial)

Descriptions:

• The P80C51BH is a CMOS version of the 8051 microcontroller, offering lower power consumption compared to NMOS variants.
• It features mask-programmable ROM, meaning the program code is factory-programmed and not user-erasable.
• Compatible with the MCS-51 instruction set, supporting 111 instructions with single-cycle execution for most instructions.
• Includes Boolean processor capabilities for efficient bit manipulation.

Features:

• Low-power CMOS technology
• 128-byte internal RAM + 128-byte Special Function Register (SFR) space
• Expandable external memory (up to 64 KB for code and data)
• Power-saving idle and power-down modes
• Programmable serial communication (UART)
• Hardware multiply/divide instructions
• Boolean (bit-level) processing support

This microcontroller was widely used in embedded systems, industrial control, and consumer electronics during its time.

*(Note: The P80C51BH is an older Intel microcontroller and may be obsolete or replaced by newer variants.)*