COMP 273 Lecture Notes - Lecture 6: Electric Toothbrush, Sequential Logic, Microwave Oven
27 Feb 2016
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Today i will nish o our discussion of registers, and then move on to discuss larger memories. The circuit below on the left shows a d ip- op, such that the data input d comes from the complement of the stored value q. At every clock cycle, the q value changes, namely it takes the value q. If the d ip op is falling edge triggered, then the value changes when the clock goes from. 1 to 0 which is the case shown on the right below. If the d ip op is rising edge triggered, then the value of q changes when the clock rises from 0 to 1. Such a ip- op is called a t ip- op where t is for toggle. Note that the t ip op changes its value at half the rate of its clock input. Suppose we make a register out of t ip ops as shown below.
