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- Ah, it depends on SPI speed, the lower the speed, the longer you can use the wires.I am playing with SPI 100kHz, 60cm, and found signals not distorted or noisy. If you convert 3V3 signal to 5V0, then it is OK to use longer wires.tlfong01– tlfong012020-02-08 11:20:21 +00:00Commented Feb 8, 2020 at 11:20
- This is my recent SPI 100kHz waveform, with 60cm wiring, in case you are interested: imgur.com/gallery/aFVfLg2.tlfong01– tlfong012020-02-08 11:54:35 +00:00Commented Feb 8, 2020 at 11:54
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