General • Re: SPI write from Slave device

Not exactly... read the other modes as well (next page):

4.4.3.13. Motorola SPI Format with SPO=1, SPH=1

For continuous back-to-back transmissions, the SSPFSSOUT pin remains in its active-LOW state, until the final bit of the
last word has been captured, and then returns to its idle state as the previous section describes.

For continuous back-to-back transfers, the SSPFSSOUT pin is held LOW between successive data words and
termination is the same as that of the single word transfer.

It is almost the same on RP2350 (the same controller).

Can see more details here:
ARM PrimeCell Synchronous Serial Port (PL022) Technical Reference Manual
https://developer.arm.com/documentation/ddi0194/latest

Statistics: Posted by gmx — Sun Apr 20, 2025 5:45 pm

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