Registers and Counters

Explain briefly about how 1011 data can be stored and retrieve in 4-bit parallel-in parallel-out (PIPO) shift register with neat diagram and its corresponding data transfer timing diagram.

Explain briefly about how 1101 data can be stored and retrieve in 4-bit parallel-in serial-out (PISO) shift register with neat diagram and its corresponding data transfer timing diagram.

Describe the operation of mod-12 asynchronous counter using negative-edge triggered T flip-flops with neat logic circuit diagram and timing diagram.