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Microprocessor

Microprocessor
Of the following circuits, the one which involves storage is

RS Latch
Nand
Mux
Decoder

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Microprocessor
SUB A instruction in 8085

 sets zero and carry flags
 reset carry and sign flags
 reset zero and parity flags
 sets zero and sign flags

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Microprocessor
SPHL instruction copies the content of H-L register pair to the _________.

 D-E
 PSW
 Stack Pointer
 B-C

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Microprocessor
In an 8085 microprocessor based system, the contents of SP are 1000H, PUSH B instruction will transfer the contents of registers B & C respectively for memory locations

 1000 H and 1001 H
 0FFE H and 0FFF H
 1000 H and 0FFF H
 0FFF H and 0FFE H

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Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 PUSH PSW
 PUSH SP
 POP PSW
 PUSH A

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Microprocessor
The 8085 microprocessor uses a crystal of frequency 6.25 Mhz. The T-state value is

 640ns
 320ns
 960ns
 1280ns

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