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How are the bits of the register PSW affected if we select Bank2 of 8051?

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+1 vote
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in Microcontroller by (14.6k points)
How are the bits of the register PSW affected if we select Bank2 of 8051?

(a) PSW.5=0 and PSW.4=1

(b) PSW.2=0 and PSW.3=1

(c) PSW.3=1 and PSW.4=1

(d) PSW.3=0 and PSW.4=1

The question was asked by my school principal while I was bunking the class.

Query is from Architecture in section 8051 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
The correct choice is (d) PSW.3=0 and PSW.4=1

To elaborate: Bits of PSW register are CY, AC, F0, RS1, RS0, OV, -, P so for selecting bank2 RS1=1 and RS0=0 which are fourth and third bit of the register respectively.

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