12973_Features of 8085 Microprocessor Ppt

8-bit microprocessor i.e. accepts 8 bit data simultaneously Single chip N-MOS device implemented with 6500 transistors Require single +5V power supply Clock frequency in the range of 3MHz-5MHz 8-bit data bus and 16-bit address bus 74 instructions with following addressing modes: Register,

direct, immediate, indirect and implied Provides 16 address lines hence access 64K Bytes of memory

, program as well as data memory Provides 5 hardware interrupts : TRAP , RST 7.5 , RST 6.5 ,

RST 5.5 and INTR. Provides on chip clock generator hence does not require

external clock generator

Perform arithmetic and logical operations Provides control signals to control the bus cycles Provides two serials I/O lines viz SOD and SID

hence serial peripherials can be interfaced with 8085 directly

Supports mechanism that allow 8085 to increase its interrupt handling capacity

Provides 8-bit accumulator , flag register , 6 general purpose register(B,C,D,E,H,L) , 2 special purpose 16-bit registers(SP,PC)

Data bus(D0-D7) multiplexed with lower 8 bit address bus(A0-A7) hence requires external hardware to separate data lines from address line