Question

Shift registers,

So basically i am new to shift registers, just started studying about them.

I got this shift register. http://screencast.com/t/BynU6VUrRm6O

Could you help me understand how these outputs (timing diagram) on the shift register?
http://screencast.com/t/w3DNCa8H4PA

Answer 1

look at CLR waveform. notice that CLR signal makes the register values to 0, at the beginning, and at the ending

Answer 2

next see that A is your actual data and B is used as gating signal