Salient Features of 8051 Microcontroller
- It has 8 bit CPU with register A and B.
- Internal RAM of 128 bytes.
- Internal ROM of 4K bytes
- 32 I/O pins : Four 8 bit ports ( PORT0 to PORT3)
- Two 16-bit Timer/Counter
- 16 bit Program Counter (PC) and DPTR
- 8 bit Stack Pointer (SP)
- 8 bit Program Status Word (PSW)
- 5+1 Interrupt sources with priority level
- Full duplex Serial data transmitter / receiver.
- On-Chip oscillator