Hi Alberto:
In card emulation mode we only support same Baudrate.

This is from NCI 1.0 (PN7150). PN7150 supports 106, 212, 424, 848kbit/s , but with TA(1), we don't support change the baudrate, for example, 106kbit/s on card mode and 212kbit/s on reader and this is not supported on card emulation mode.
Regards
Daniel