Two Marks Questions with Answers

Two Marks Questions with Answers

Q. l How many address lines are required to interface 4096 × 8 EPROM chip ?

Ans. : Twelve address lines are required to interface 4096 × 8 EPROM chip.

Q. 2 State the basic concepts in memory interfacing.

Ans. : The primary function of memory interfacing is that the microprocessor should be able to read from and write into a given register of a memory chip. To perform these operations the microprocessor should

1) Be able to select the chip. 2) Identify the register. 3) Enable the appropriate buffer.

Q.3 Define interfacing.

Ans. : Interfacing is the method used to interconnect two separate electronic devices in such a way that their output and input voltages and currents are compatible.

Q.4 What is the need for interfacing ?

Ans. : To communicate with external world, microprocessor needs interfacing with peripheral storage devices, input and output devices and display devices.

Q.5 List the steps involved in interfacing a memory to the 8085 microprocessor.

(Refer section 6.4)