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TMS570LS3137: SPI5 issue

Part Number: TMS570LS3137


Using the AUTOSAR_MCAL_TMS570LSx-05.30.00, If PortPinSpi5_10( MiBSPI5SOMI0) is set to Mode SPIin the Port Configuration, SPIPC0 bit 24 is set.
If PortPinSpi5_6(MiBSPI5SIMO0) is set to Mode SPI in the Port Configuration, SPIPC0 bit 16 is set.
But for all the other SPI ports like eg., SPI3 if the PortPinSpi3_8(MiBSPI3SIMO) SPIPC0 bit 10 is set and PortPinSpi3_9 ( MiBSPI3SOMI ) SPIPC0 bit 11 is set for the SPI Mode.

Why only for SPI5, bit 16 and 24 are set for SIMOFUN0 and SOMIFUN0?