Question

The number of wait states required to interface 8279 to 8086 with an 8MHz clock are:

• A. 2
• B. 3
• C. 1
• D. 5

Hint:

Wait states are used to synchronize data transfer between faster and slower devices in a system.

Answer 1

The Correct Option is B

The 8279 programmable keyboard/display interface requires a slower clock cycle compared to the 8086 microprocessor operating at 8 MHz. To synchronize the data transfer between the two devices, wait states are introduced. For an 8 MHz clock, the calculation for the number of wait states shows that 3 wait states are needed for proper interfacing.