Which of the following instructions is invalid?

A memory chip of 512K has 8 data pins. What is the number of address pins?

The PCON register consists of

Which bit of the TCON register i 8051 microcontroller, that whether the timers will work as timers or counters?

What is ISR in 8051 microcontroller ?

What will be the final status of the carry flag in the following code ? MOV A, # 39H MOV B, # 75H SUBB A, B

The Program Counter is a 16- or 32-bit register which contains the address of the next instruction to be executed (in an 8051 microcontroller).

Which of the following statements is/are true about the 'SWAP' instruction?

In which type of the following, instructions will be transferred at a faster rate ?

Which of the following statements about 8051 ports is not true?