Important Features of 8051
- 8bit ALU
- 8 bit accumulator
- 8 bit registers
- One 16 bit register with special move instruction
- 8 bit data bus
- 16 bit address bus
- 16 bit program counter
- 16 bit data or stack pointer
- Boolean processor with 17 instructions, 1 bit accumulator, 32 registers (4 bit addressable 8 bit), 144 special 1 bit addressable RAM variables (18 bit addressable 8 bit)
- Multiply, Divide and compare instruction
- 4 register bank with 8 registers each
- 3 Internal and 2 external interrupt sources
- Interrupt with 2-level priority and optional register bank switching
- 128 bytes of on-chip RAM (Data memory)
- 4K bytes of on-chip ROM (Program Memory)
- Four 8 bit bidirectional input/output ports
- Serial port – UART
- Two 16 bit counter/timers
- Power saving mode
- 1 Microsecond instruction cycle with 12 MHz Crystal
Related topics:
8051 History | 8051 Pin Diagram | 8051 Architecture | 8051 Memory Types | 8051 Memory Map
List of topics: 8051
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