Intel 8051
Developed by Intel in 1980 for use in embedded systems.
Intel re-intended Microcontroller 8051 employing CMOS technology and a new edition came into existence with a letter ‘C’ in the title name, for illustration: 80C51.
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| Pin Diagram |
Specifications :
- 40-pins.
- 8-bit data bus.
- 16-bit address bus.
- RAM : 256 Bytes.
- ROM : 4 KB.
- 2 16 Bit timers.
- 2 External Interrupts and 3 Internal Interrupts.
- I/O Pins – 32 : Port P0, P1, P2 & P3 each having 8 pins.
- TX and RX for full duplex communication.
- PSW (Program Status Word): Also called a Flag Register. 8 bit register where only 6 bits are used.
First RAM (128 Bytes): 4 Banks - 8 registers in every bank.
Remaining 128 bytes of RAM contains Special Function Registers (SFRs). These registers control various peripherals such as Serial Port, Timers, all I/O Ports, etc.
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