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5.1.3 Architecture of 8085 Microprocessor
The internal architecture (block diagram) of 8085 Microprocessor is shown
in figure 5.5.
Figure 5.5 : Architecture of 8085 Microprocessor
The following are the functional blocks in the 8085Microprocessor.
1. Accumulator
2. Temporary register
3. Arithmetic and Logic Unit (ALU)
4. Flag register
5. Instruction Register
6. Instruction Decoder and Machine cycle encoder
7. General purpose registers
8. Stack Pointer
9. Program Counter
10. Incrementer / Decrementer
11. Timing and Control unit
12. Interrupt control
13. Serial I/O control
14. Address buffer and Address / Data buffer
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