I am looking forward to implement the attached design using PN7462 and integrated smart card interface(USIM). The problem is the SWP interface(Pin C6) of USIM. In the reference design, it is being used as an IO.

But when I look at the datasheet of PN7462 on Page 66, I find that Pin C6 is connected to VCC and is not being used as SWIO.

I have selected PN7462 as it supports class C smart cards.

While on the other hand, according to ISO 7816 and even MIFARE SAM AV2, it can be used as IO.

Can anyone give me a hint how to interface PN7462 with SAM module via SWP interface ?

Thanks in advance for the help and support. enter image description here


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