Electrical Engineering › Section U · Sequential logic › Topic U.3
Shift registers
Line up a row of flip-flops so that each passes its bit to the next on every clock edge, and you can store a number, delay a signal, or turn a stream of bits on one wire into a parallel word. That is a shift register.
In this topic
- Storing and shifting bits
- Four ways in and out
- Worked example: loading a serial register
- Bidirectional and universal registers
- Shift register counters
- Worked example: a 4-bit Johnson counter
- Time delay
- Serial-to-parallel conversion and the UART
- Symbols and troubleshooting
- Common mistakes to avoid
- Key takeaways
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