Microcontroller Flashcard

Front

How many ports are there in 8051?

Back

8

Front

What is the size of the accumulator in 8051?

Back

8 bits

Front

Which pins are used as the data bus in 8051? Options: P0.0-P0.7, P1.0-P1.7, P2.0-P2.7, P3.0-P3.7

Back

P0.0-P0.7

Front

Which pin is used as the transmit data in 8051? Options: TXD, RXD, P3.0, P3.1

Back

TXD

Front

What is the primary function of the ALU in 8051?

Back

To perform both arithmetic and logical operations

Front

Which logical operation can be performed by the ALU in 8051 using the ANL instruction?

Back

AND

Front

What is the purpose of the carry flag (CY) in the ALU of 8051?

Back

To indicate a carry or borrow in an arithmetic operation

Front

What is the primary function of the Program Counter (PC) in 8051?

Back

To keep track of the current program address

Front

How does the Program Counter (PC) increment in 8051?

Back

Automatically after each instruction

Front

What is the function of the pull-up resistors in the I/O ports of 8051?

Back

To pull the input signals high