Is decoder same as decoder?
A Decoder decodes an encrypted input signal to multiple output signals from one format to another format. A De-Multiplexer routes an input signal to multiple output signals. A Decoder has ‘n’ input lines and maximum of 2n output lines. A De-Multiplexer has single input, ‘n’ selection lines and maximum of 2n outputs.
Is multiplexer a decoder or encoder?
Difference between of Multiplexer and Decoder :
| S.NO. | Multiplexer | Decoder |
|---|---|---|
| 3. | It can be used in data routing and waveform generation. | Application of decoder is in Decimal to BCD encoder. |
| 4. | Multiplexer converts the unary code into binary code | Decoder converts binary code into unary.. |
What’s the difference between an instruction and an op code?
Op-code in contrast always and only refers to the first byte/word (usually) in object code. Then again, when looking at code, instruction also may describe the whole works. Everything else is lazy usage. or else “instruction” is used to mean a particular instance of an opcode along with its operands. It’s the other way around.
How is the operand used in an instruction decoder?
The operand provides a literal, file register address or program address, which will be used by the instruction. If, for example, the instruction is MOVLW (Move a Literal into W), the control lines will be set up to feed the literal operand to W via literal data bus to the multiplexer and ALU.
Can a decoder be replaced by a multiplexer?
Lets assume a 2-to-4 decoder and a 4-to-1 multiplexer, what I understand is they both select one input based on the selector’s combination. Is there any scenario that a multiplexer can be replaced by a decoder and vice versa?
What’s the difference between opcode and instruction in the Z80?
Counting the number of instructions does make sense in the specific case of comparing the Z80 versus early Intel CPUs: the two instruction sets were quite similar. It is possible to mechanically translate the Intel assember source into Z80 code, so comparing them makes sense.