Smart Card communication baud rate error.

[q123w123e123qweqwe]

Hello, We're using STM32WB55RGV6 and trying to communicate with a smart card. At the beginning of communication, we can read ATR and we can send and receive PPS successfully. But when we try to send an APDU message our data signal doesn't fit our calculated baud rate. And we're getting framing error on the logic analyzer, as you can see on the picture. Our calculated baud rate is 212500. Has anyone worked with smart card interfaces?

[Remy ISSALYS]

Hello,

I'm not familiar with smart card interface but maybe you can find some useful information in AN4800, concerning the baud rate you can look part 2.4 Smartcard clock generator.

Best Regards