同濟大学 TONGJI UNIV SI SO SI SO Shift register A Shift register B CLK CLK Clock Shift control (a)Block diagram Clock ΠΠΠΠΠΠΠΠΠΠΠ Shift control Π几几Π CLK T1 T2 T3 T4 (b)Timing diagram Fig.6-4 Serial Transfer from Register A to register B 2002 Prentice Hall.Inc. M.Morris Mano DIGITAL DESIGN,3e