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--- tutorials:products:rfidnfc:faqs.html [2012/07/23 20:38]
ktownsend
+++ tutorials:products:rfidnfc:faqs.html [2012/07/25 16:23]
ktownsend
@@ Line 1: / Line 1: @@
 ====== Frequently Asked Questions  ======
-Blah blah blah
+Some of the more common questions on the forums related to the [[http://www.adafruit.com/products/364|PN532 NFC/RFID Breakout]] and [[http://www.adafruit.com/products/789|NFC Shield]].
+===== Can the PN532 read Tag-It tags from TI? =====
+No.  The PN532 is designed to be used with [[http://en.wikipedia.org/wiki/ISO/IEC_14443|ISO14443]] tags, with Mifare Classic probably the most common general-purpose tag type in use.  For more information on supported tags see http://www.libnfc.org/documentation/hardware/tags/iso14443 or search for information on the common Mifare tag family based on ISO1443A.
 ===== Can I set a delay calling readPassiveTargetID() ?  =====
@@ Line 81: / Line 85: @@
 }
 </code>
+===== Hey wait ... isn't there something funny with the SVDD pin? =====
+Indeed, good eye!  Unfortunately, both v1.0 and v1.3 of the breakout boards have a problem on the schematic.  SVDD is connected directly to VDD, but should be left floating since it is used to power secure modules.  This has no effect on the functionality of the boards, but does cause some extra current to be drawn.  It will be fixed on the next revision of the board, but if you require the use of the secure modules (rare), you can simply cut the trace to the left of C22, which is the cap connected to SVDD (just follow the trace straight up from pin 37).

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