8051 Pins

The Intel 8051 has ____ pins.

Number of I/O ports in the microcontroller is _____ (in number).

Match the following:

Which among the below mentioned functions does not belong to the category of alternate functions usually performed by Port 3 (Pins 10-17) ?

Which pin provides a reset option in 8051?

External access is used to permit ____

Which pin of Port 3 has an alternative function as write control signal for external data memory?

Match the pins with its alternative function:

If the __ pin is ___ then we have the option of using the ____ ROM or EPROM together with _____ memory and devices.

Port 0 acts as GPIO when _____ connected externally.

Select the correct answers with respect to ALE.

The port which doesn’t serve any alternative function is ____

What should be done to access the program from external program memory?

On chip peripherals of 8051 are connected to _____

Pins ___ and ___ are used for connecting external oscillator.

Which pin acts as program pulse input during flash programming?

Expand Vpp

When external memory is accessed which are the ports acts as address lines?

All the ports of 8051 have bidirectional input/output lines.

Pins which provide power supply are _____