There are some important features of microcontroller which are given below,
- The 89c51 is compatible with MCS 51 family.
- It has 8 bit data bus and 8 bit (arithmetic logic unit).
- It has 4k bytes of on chip reprogrammable flash memory.
- It supported three level program memory lock.
- It has 16 bit of address bus and 64 kb of RAM (random access memory) and ROM (read only memory).
- It has on chip RAM 128 bytes data memory.
- It has four 8 bit bidirectional input or output ports that is 32 programmable input or output lines.
- It can execute 1 million one cycle instructions per second with a clock frequency of 12MHz.
- It has one UART programmable serial ports.
- It has six interrupts source.
- It has two multimode 16 bit timers.
- It has two level interrupts priority.
- It has power saving mode.
