Most students focus on parallel data transfer, but Gaonkar highlights a unique feature of the 8085: built-in serial communication.
To separate data from addresses, an external latch IC (such as the 74LS373) is required:
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: Can access up to 64 KB (65,536 locations) via a 16-bit address bus. 2. Internal Architecture & Register Set
Gaonkar defines five ways to specify data in 8085 instructions: Most students focus on parallel data transfer, but
Alters the normal sequential flow of execution conditionally or unconditionally (e.g., JMP 2000H , JZ 3000H , CALL 4000H , RET ).
Copies data from a source to a destination without modifying it (e.g., MOV A, B , MVI C, 20H , LXI H, 2050H ). Internal Architecture & Register Set Gaonkar defines five
A positive-going pulse generated at the beginning of every machine cycle. It latches the address bits onto an external latch. Control Signal Generation: Combining
Data is directly provided in the instruction (e.g., MVI A, 05H ). Register: Data is moved between registers (e.g., MOV A, B ).
The total time required to fetch and execute an instruction.