It was recently pointed out to me that if you search for the AW-CM389MA datasheet you will find two versions. One for the AW-CM389MA with an SDIO interface and one for the AW-CM389MA with a PCIe/USB interface. Both give the model name as AW-CM389MA. Is it possible that the wrong version was sourced? (Mind you the current entry on the Arrow website does give the interface as SDIO).