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Microprocessors & Microcontrollers8051 Registers

In the 8051, the register bank is selected using which bits in the PSW?

  • ARS1 and RS0
  • BCY and AC
  • COV and P
  • DEA and ES
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Correct Answer: A. RS1 and RS0
Explanation: PSW bits RS1 and RS0 select one of the four register banks.
Reference: Standard microprocessors and microcontrollers: 8051 registers
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