how to distinguish exact chipset in firmware

[gentilkiwi]

As they don't have the same functionalities, how to know to which circuit exactly we are addressing?

• ST25R3911B or ST25R3912 or ST25R3914 or ST25R3915
• ST25R3916 or ST25R3917 or ST25R3918 or ST25R3920
• ST25R3916B or ST25R3917B or ST25R3919B or ST25R3920B
• ST25R100 or ST25R200
• ST25R300 or ST25R500 or ST25R501

It seems each chip in the same group share the the same `ic_type` & `ic_rev`, so how to distinguish them in firmware?

[Ulysses HERNIOSUS · Accepted solution]

Hi,

some of them are completely indistinguishable from chip perspective. Only package might be different.

A few may have features disabled which might be recognized by some intelligent code. But no general way available.

Regards, Ulysses

[gentilkiwi]

Hi Ulysses
Than you for this response.

Can be interesting to modify ic_identity register to get more specific results in future :(