SWRZ154 August 2023 IWR1843AOP
MibSPI in Peripheral Mode in 3- or 4-Pin Communication Transmits Data Incorrectly for Slow SPICLK Frequencies and for Clock Phase = 1
The MibSPI module, when configured in multibuffered peripheral mode with 3-functional pins (CLK, SIMO, SOMI) or 4-functional pins (CLK, SIMO, SOMI, nENA), could transmit incorrect data when all the following conditions are met:
The issue can be avoided by setting the CSHOLD bit in the control field of the TX RAM (Multi-Buffer RAM Transmit Data Register). The nCS is not used as a functional signal in this communication; hence, setting the CSHOLD bit does not cause any other effect on the SPI communication.