Reset PN532 on NFC shield and breakout

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sin
 
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Joined: Mon Aug 13, 2012 8:31 pm

Reset PN532 on NFC shield and breakout

Post by sin »

Hi,

Arduino PN532 shield and PN532 breakout board have RSTOUT_N pin out, or the pad for connection. On the data sheet it is indicated as I/O pin but its description says that it indicates that PN532 is in reset stat or not.
The data sheet describes that RSTPD_N, which is not available on PN532 shield, can reset the chip on its falling edge.

Are there any smart way to reset PN532?

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ktownsend
 
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Re: Reset PN532 on NFC shield and breakout

Post by ktownsend »

RSTPD_N is available on the top of the breakout board and can be used to do a hard reset if required.

It is also available on the shield on the optional 6 pin header as pin number 5 (marked as RST, just before IRQ). RSTOUT_N isn't broken out on the shield, only on the breakout board.

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sin
 
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Re: Reset PN532 on NFC shield and breakout

Post by sin »

Thank you!

As you have pointed out, RST pad on NFC shield is connected not to RSTOUT_N (like in break-out board front pins) but to RSTPD_N.
Also I found the pages in PN532 User Manual that mentions Reset can be done by falling edges on VDD or RSTPD_N pin, and there is no firmware command.
ktownsend wrote:RSTPD_N is available on the top of the breakout board and can be used to do a hard reset if required.

It is also available on the shield on the optional 6 pin header as pin number 5 (marked as RST, just before IRQ). RSTOUT_N isn't broken out on the shield, only on the breakout board.

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