HIGHHSPEED PARALLELLSERIAL DATA CONVERSION CIRCUIT

摘要

PURPOSE:To speed up the serial-parallel conversion, by directly outputting the first one bit and outputting remaining (n-1)bits via a shift register, among n bits of parallel data. CONSTITUTION:A parallel data PD0 is directly input to a multiplexer 4, and other parallel data PD1-PDn-1 are input to the multiplexer 4 after serial-parallel conversion at a shift register 1. After the parallel data PD1-PDn-1 are set to the shift register 1 with the clock signal (c), they are output from the terminal OUT1 with sequential shift. When PD1-PDn-1 switch the data selective input of the multiplexer 4 with the first clock signal (c) after the parallel set to the shift register 1, serial data can sequentially be obtained from PD0 as the output of the multiplexer 4.