1. Lecture 7a – 1ELEC2200 Fall 2015 – L. Yobas Lecture 7a Registers ELEC2200 Digital Circuits and Systems Fall 2015 Instructor: Levent Yobas

2. Lecture 7a – 2ELEC2200 Fall 2015 – L. Yobas Application example–serial data transfer  To reduce the number of parallel wires, we can transfer data in serial fashion, i.e. one bit at a time.

3. Lecture 7a – 3ELEC2200 Fall 2015 – L. Yobas 00000000 x00 Serial Communication 10000101 x00 10000000 x80 01000000 x40 10100000 xA0 01010000 x50 00101000 x28 00010100 x14 00001010 x0A 10000101 x85 100001010100001000100001000100000000100000000100000000100000000100000000 x85x42x21x10x08x04x02x01 0101000010 1 0 123456789 0 0 x00

4. Lecture 7a – 4ELEC2200 Fall 2015 – L. Yobas Shift Register Timing  SI_A = 0; QA, QB initially at x00

5. Lecture 7a – 5ELEC2200 Fall 2015 – L. Yobas Serial Adder Operation 1001 0011 1 1 0 1 0 0 0100 0001 0010 0000 1001 10001000 010 01000100 0 1 1 1 0 0 0 1 0 1 1 0 0 0 1 0 1100 1234 1 0 0 0 0