The TAG, or development board uses the SOC version of the BCM2073x device (TAG2 = BCM20732, TAG3 = BCM20737). For a better understanding of the IO on the SOC devices, please consult the BCM2073x datasheet: CYW20732 SOC Data Sheet
Note here that the 20736/37 are pin compatible to the 20732, so the SOC datasheets we are rolling out for those parts will be close to identical to this one.
On the module, it includes the SOC internally, but the IO is fed through a somewhat complex muxing system, so mapping IO between the two devices is not entirely straightforward.
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