Features of 89C51
1. 89C51 is compatible with MCS-51 family It means it is compatible with any of microcontroller device related with 51 family.
2. 8 bit data bus and 8 bit ALU It can perform arithmetic logical operations with 8 bit data.
3. 4K Bytes of On-Chip Reprogrammable Flash Memory In this chip the available memory is 4K Bytes. This is reprogrammable in an instant.
4. Support Three-Level Program Memory Lock. It means that there are three different levels of locking available for the program memory.
5. 16 bit address bus – 64KB of RAM and ROM. It has 16 bit address bus and 64 KB of RAM and ROM.
6. On Chip RAM – 128 bytes (Data Memory). It has 128 bytes of data memory to save instructions.
7. Four 8 bit bi-directional input/output ports Four 8 bit bidirectional input/output ports i.e. 31 Programmable I/O Lines.
8. Programmable serial ports i.e. One UART (serial port).
9. Two Multimode 16 bit timers.
10. 6 interrupt source.
11. Two-level interrupt priority.
12. Power saving mode.
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