Draw the architecture of boundary scan test (BST) and explain the operation. Why is BST required? What is a signature analyser? Draw the architecture of a LFSR (linear feedback shift register) for the...

Draw the architecture of boundary scan test (BST) and explain the operation. Why is BST required?

What is a signature analyser? Draw the architecture of a LFSR (linear feedback shift register) for the following characteristic polynomial, 1 + x + x³.