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S32k148 - SAI FIFOs

Question asked by Jakub Mielczarek on Jan 23, 2019
Latest reply on Mar 4, 2019 by Jakub Mielczarek



I am using s32k148 chip. When reading the SAI Rx FIFOs, I am getting pointer values greater than 7.

The S32K Reference Manual specifies, that each receive channel has a FIFO of 8 units (each unit 32-bit size). The manual also specifies, that in SAI RFRn register WFP and RFP have 4-bit size, which is more than required to store 0-7 write/read pointer.

Are the FIFOs bigger than 8 units? Is it normal to observe Rx WFP values larger than 7?


Thank you,