P80C51 Microcontroller 8 Bit 40 Pin

P80C51 Microcontroller 8 Bit 40 Pin 

The P80C51 is an 8-bit microcontroller originally manufactured by Philips (now NXP Semiconductors). It is a classic member of the 8051 microcontroller family and is instruction-set compatible with the standard Intel 8051.

The P80C51 is based on Harvard architecture and uses an 8-bit CPU optimized for control-oriented embedded applications. Unlike later versions, the P80C51 typically does not include on-chip program ROM, requiring external program memory, which makes it suitable for learning the external memory interfacing of the 8051 family.

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Features

• 8-bit 8051-compatible CPU
• 40-pin DIP package
• Operating voltage: 4.5 V – 5.5 V
• Clock frequency: Up to 12 MHz
• Program memory: External (up to 64 KB)
• Data memory:
• 128 bytes internal RAM
• Supports external RAM up to 64 KB
• I/O ports:
• 32 programmable I/O pins (4 × 8-bit ports)
• Timers/Counters:
• Two 16-bit timers (Timer0 and Timer1)
• Serial communication:
• Full-duplex UART
• Interrupts:
• 5 interrupt sources with two priority levels
• Power-saving modes: Idle and Power-down
• On-chip oscillator support

Applications

• Embedded control systems
• Industrial automation
• Learning and training systems
• External memory interfacing applications
• Measurement and monitoring devices
• Legacy embedded products