When the rightmost data bits are sent back to the beginning, it ...

[erika]

When the rightmost data bits are sent back to the beginning, it is known as a
 
  A) back spacing register. B) output/input register.
  C) recirculating register. D) flip-flop register.

Question 2

The serial I/O is provided by
 
  A) RXD and PXD. B) PXD and YXD. C) CXD and VXD. D) TXD and RXD.

[quynhmickitran]

Answer to Question 1

C

Answer to Question 2

D