Features of 8085 Microprocessor

• 8085 MPU is an 8-bit microprocessor i.e. it can accept, process and provide 8-bit data.

• It operates on +5V power supply connected at Vcc.

• Power supply ground is connected to Vss.

• It has 8 data lines (D0 - D7).

• It has 16 address lines (A0 - A15). It can access 2^16 = 64K of memory.

• It has 8 bit I/O address. It can access 2^8 = 256 I/O ports.

• It operates on clock cycle with 50% duty cycle.

• It operates with a 3MHz clock frequency.

• The lower 8-bit address bus (A0 - A7) and data bus (D0 - D7) are multiplexed to reduce number of external pins.

• It has 8-bit accumulator, flag register, instruction register, six 8-bit general purpose registers (B, C, D, E, H and L) and two 16-bit registers (SP and PC).

• It has five hardware interrupts. They are TRAP, RST 7.5, RST 6.5, RST 5.5 and INTR.

• It has serial I/O control which allows serial communication.

• It has control signals (IO/M, RD, WR) to control bus cycles.

• It has five addressing modes. They are: immediate, register, direct, indirect and implied.

• It has powerful instruction set that can do various arithmetic operations and some logical operations.