Forum Post: RE: Can't write to RSPI

Hello Pete, You can find it in the SSP User's Manual, Section 4.2.28.5 "SPI data transfer using DTC": SCI SPI performs only 8-bit data transfer, both in DTC and SPI transfer modes. And RSPI supports only 32-bit data transfer in DTC transfer mode (For S124, RSPI supports only 16-bit data transfer in DTC) and it supports all 8, 16 and 32 bit data transfer in SPI transfer mode. Regards