$3.(8$ points$)$ Assume that the logic blocks used to implement the single$-$cycle processor have the

following delay values:

$$I$-$Mem$/$D$-$Mem$$ is the amount of time to access the Instruction or Data Memory.

$$Register File$$ is the amount of time to read rs$1$ and rs$2$ after a rising clock edge.

$$PC Read$$ is the amount of time needed after a rising clock edge for the new PC value to appear

on the output; this delay value applies to the PC only.

$$Register Setup$$ is the amount of time a register$$s data input must be stable before a rising clock

edge; this delay value applies to both the PC and Register File.

$$Control$$ is the total amount of time for the Control unit and the ALU control unit to produce the

$4-$bit $$ALU operation$.$

$($a$)(4$ points$)$ Consider the four instructions: add, ld$,$ sd$,$ beq, which is the least time consuming

one and how much time does it need?

$($b$)(4$ points$)$ What is the minimum clock period for this processor? You must justify your answer $(8$ points$)$ Assume that the logic blocks used to implement the single$-$cycle processor have the

following delay values:

$"$I$-$Mem$/$D$-$Mem" is the amount of time to access the Instruction or Data Memory.

"Register File" is the amount of time to read rs$1$ and rs$2$ after a rising clock edge.

$"$PC Read" is the amount of time needed after a rising clock edge for the new PC value to appear

on the output; this delay value applies to the PC only.

"Register Setup" is the amount of time a register's data input must be stable before a rising clock

edge; this delay value applies to both the PC and Register File.

"Control" is the total amount of time for the Control unit and the ALU control unit to produce the

$4-$bit "ALU operation".

$($a$)(4$ points$)$ Consider the four instructions: add, ld$,$ sd$,$ beq, which is the least time consuming

one and how much time does it need?

$($b$)(4$ points$)$ What is the minimum clock period for this processor? You must justify your answer.