Is it possible to use a Clock Oscillator instead of Quartz crystal oscillator?

Hello Simon,

It is possible to provide an external clock to the ST25R3911B.

Therefore, XTI can be used as a clock input. In this mode, the test register has to be configured properly:

To disable oscillator and use XTI as clock input, the tana_7 has to be set to “1�? according to chapter “1.2.15 Test access�? of the ST25R3911B Datasheet.

XTI shall not be driven above VDD_D and below GND.

The clock should be 13.56MHz or 27.12MHz and the bit "osc" has to be set accordingly.

In fact, this method is used by us when testing each chip after production.

What is the reason, you want to use an external clock source?

It would be great if you could share your experience.

BR Travis