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Chip selects are optional. You can daily chain multiple spi devices and push the data out in a contiguous block. All the chip selects are tied together and only
by MisterTea 5y ago
Chip selects are optional. You can daily chain multiple spi devices and push the data out in a contiguous block. All the chip selects are tied together and only one cs line is used from the cpu.
- duskwuff 5y ago> You can daily chain multiple spi devices For some simple SPI devices, sometimes. Many SPI devices, especially more complex ones, won't let you shift data through the device without attempting to interpret it.
- monocasa 5y agoOr will shift out something completely different, like the response to the last command they received, just FFs so you can three wire in the general case, or even just garbage.
- flyingcircus3 5y agoFlash memory devices use the CS line as an integral part of the protocol. It is definitely not optional.