about pn532 Card Emulation

smartmx

Hi!

It is found that the frequency of Crystal oscillator will shift due to the temperature of the environment.

However, the offset is within the range specified in iso 14443, and the frequency of the card reader through the test is 13.565MHZ.

At this frequency offset, the card simulation mode is used.

I Would like to ask about the frequency of card simulation mode is using itself osc?

Or will the antenna get the frequency sent by the card reader?

Will card simulation mode have compatibility problems when using 13.565MHZ?

jimmychan

Would like to ask about the frequency of card simulation mode is using itself osc?

-> Yes,

Or will the antenna get the frequency sent by the card reader?

-> No.

Will card simulation mode have compatibility problems when using 13.565MHZ?

-> Minor frequency shifts are not typically a problem.

jimmychan

Would like to ask about the frequency of card simulation mode is using itself osc?

-> Yes,

Or will the antenna get the frequency sent by the card reader?

-> No.

Will card simulation mode have compatibility problems when using 13.565MHZ?

-> Minor frequency shifts are not typically a problem.

smartmx

thanks for your help !

smartmx

PCD: 13.553Mhz

PICC: 13.567Mhz

Can the card reader communicate with the card successfully?