quartz/content/notes/03-sequential-logic-circuits.md
2022-07-19 21:31:14 +12:00

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---
title: "03-sequential-logic-circuits"
aliases:
tags:
- cosc204
---
comb log. circuits always produce the same output with the same inputs
Sequential logic circuit output depends not only on the inputs but also past history (memory)
![combinatorial vs sequential](https://i.imgur.com/GbfAZ4c.png)
Two types:
- synchronous
- changes of state happen in time with a clock cycle
- input changes occur between clock pulses
- state changes occur at the clock pulses
- asynchronous
- We will not be studying these
- State changes occur as changes in inputs occur
- Event driven
# Memory circuits
- Set-reset latch
- D-type flip-flop
- T-type flip-flop
- JK-type flip-flop