Class Exercise 1B

Rules If you believe that you know a correct answer, please raise your hand I will select one or more students (independently whether an answer given by the first student is correct or incorrect) Please, identify yourself by first name and give an answer Correct answer = 1 bonus point 8

Problem 1 What is a difference between combinational logic and sequential logic?

Problem 2 What is a difference between Latches and Flip-flops?

Problem 3 What is a difference between: Reset active high vs. Reset active low Asynchronous Reset vs. synchronous Reset?

Problem 4 What is a register?

Problem 5 Draw a block diagram of the digital circuit with the following interface and functionality: Interface: Din – 8-bit data input Dout – 8-bit data output Addr – 2-bit address of the location (register) where input data is stored or output data is read from RW – control signal, 0=read, 1=write Clk – clock

Problem 5 (cont.) Functionality: If RW = 1, then the output Dout is set to the high impedance state, and at the next rising edge of the clock, data from the input Din is stored in the internal location given by the address Addr. If RW = 0, data from the location given by the address Addr is transferred to the output Dout, and the contents of the internal memory (registers) does not change.

Problem 5 (cont.) Assume that the internal memory is implemented using registers. Use only medium scale components, such as registers, multiplexers, encoders, decoders, buffers, etc.

Problem 6 Draw internal structure of a 4-bit Shift Register with Enable and Parallel Load

Problem 7 What is a difference in terms of the required inputs and outputs between ROM and RAM of the same size (e.g. 2m x n)?

Problem 8 What is a difference between a single-port and dual-port RAM? What operations are allowed in the dual-port RAM?