In TSSST switch (where SSS stands for a three-stage space-division switch) with N=150.  It is used 15 time division switches in the first stage and 15 time division switches in the fifth stage. We use 3 crossbar switches in the second stage, 2 crossbars at the third stage, and 3 crossbars at the fourth stage. What is the total number of crosspoints?

The connection diagram shows multiple gates and the pins assigned to each gate. For example, from the datasheet connection diagram of IC 7400, four individual NAND gates can be observed. Pins 1, 2 and 3 are all related to one of the four NAND gates. For each gate the top input is assigned the letter A while the bottom input is assigned B and the output is assigned the letter Y. The function tables of the ICs are normally given in terms of H (High logic level) and L (Low logic level). Referring to the datasheet function table of IC 7400 shows the four different input combinations of A and B and the corresponding output Y for one of the four NAND gates. There is also one more letter assignment that could be found in function tables, this is the letter X, a don't care assignment. In cases where an X is given, it can be replaced by either an H or L assignment without effecting the resultant functionality of the IC. An example of this case can be seen for the function table of IC 7402. The…

Q2) Consider three-stage space-division switch with N=500, n= 50, k=5.3. What is the maximum number of simultaneous connections for your design?

This is the question: Suppose that we want to synthesize a circuit that has two switches x and y. The required functional behavior of the circuit is that the output must be equal to 0 if switch x is opened (x=0 ) and y is closed (y=1); otherwise the output must be 1. My friend sent me the answer which I will attach but I have no idea what is going on .. can someone please explain in detail?

Draw a circuit to implement a switching network with two data inputs (A and B), two data outputs (C and D), and a control input (S). If S=1, the network is in pass-through mode: C=A and D=B. If S=0, the network is in crossing mode: C=B, and D=A. Use the most reasonable combinational building blocks or gates. Label the inputs and outputs.

Here's a table showing the tco and tro for each of the components in the circuit bellow. Please compute tco and tpo for the whole circuit? tco tPD B Inverter 0.1 ns 0.6 ns AND2 0.4 ns 0.8 ns C XOR2 0.5 ns 1.8 ns MUX2 0.5 ns 1.5 ns

Assume we are writing a testbench for a sequential circuit that has three control inputs (cA, cB, cC) and a periodic clock (clk). If we define CLK_PERIOD as a localparameter with a value of 50 (nsec), write the testbench segment that would ensure all possible combinations of the control inputs were tested on a clock rising edge. This is can be done more elegantly if you define each time step in terms of the constant CLK_PERIOD. Your answer should include the statements that define clk, cA, cB, and cC over time. Hint: think of how you would show all combinations of three variables on a truth table and replicate that over time, where each combination is held over a timespan with a clock triggering edge.

Q4/ Chose the correct data input for 4-1 multiplexer that used to Design the switching network F F(A,B,C,D.E)=Em( * 0, 1, 3, 15, 24, 30) +d( 6,12,29)

A single crossbar switch has 20 inputs and 20 outputs. How many crosspoints does it have? what is the possible number of simultaneous connections for this switch?

Design the interface for a positive logic switch to TM4C123GXL Port A pin 7. Show formulas and calculations for each circuit element. Draw the circuit schematics with components labelled with their names and values. Write the C code as a function to initialize the port for interfacing the switch. Write a function to read the data value of Port A pin 7. Comment your code to explain each initialization step clearly.