ISRO2007-08

Question

A read bit can be read

• A. and written by CPU
• B. and written by peripheral
• C. by peripheral and written by CPU
• D. by CPU and written by the peripheral

Comments

@Arjun Sir Please provide some info about this topic. How exactly the read bit is used?

Answer 1

I think answer is option D.

Every peripheral device is controlled by writing and reading its registers

Answer 2

The read and write functionality depends on the type of microcontroller peripheral. Generally, the status bits have a read only status and can be modified by peripherals only. So, read bit can be read by CPU and written by the peripheral.

So, option (d) is right