Question

Hardware security

HW-1

Combinational Logic

Q.1 a) Complete the truth table for the 4-inputs, 16 cells LUT ( Look-up Table) and map the follwing function on the LUT. Asume ‘a’ to the MSB ( Most significant bit) and lable all inputs and outputs of the LUT.

F= a+bd

LUT

A (MSB)	B	C	D (LSB)	F (output)

2. Draw the circuit level for the above function.

Q.2 Assume that a simple diagram of a switch used in SRAM based FPGA is has four destination points (N, S, E and W) and consists of 6 pass transistors. If the North-EAST and North- South terminals of the switch are connected through PMOS transistors and the rest of the connections of other terminals use N-MOS pass transistors.

1. Draw a simple diagram of the programmable switch

2. Program the switch ( by placing a 1 or a 0 on the transistor gates) such that:

• Signal is transmitted from West (W) to East ( E ) via North. To prevent any leakage current, disable all unused pass transistors.

T1=       T2=     T3=     T4=       T5=    T6

• Signal is transmitted from West (W) to East ( E ) via southwest path. To prevent any leakage current, disable all unused pass transistors.

T1=       T2=     T3=     T4=       T5=    T6

• Signal is transmitted from West (N) to East ( S ) via southwest path. To prevent any leakage current, disable all unused pass transistors.

T1=       T2=     T3=     T4=       T5=    T6

Answer 1

Posting mustiple questions is not allowed. So according to the policy we are required to answer only the first question if multiple questions are posted. In case the questions are fill in the blanks or one word answers, then we can answer all the questions.

Hope you understand. Thank you!