Hallo, > the Nexus S device NXP PN544 NFC controller supports not only SWP for > UICC based SE, but also the S2C (aka NFC-WI)
Correct. > for the external, e.g. > micro SD card SE. Does anybody know how this can be enabled and what > it means for the SD card? Well, as you mentioned yourself there is no SD card slot with the Nexus S. > That is not relevant for the Google Nexus S > (there is not SD card slot), but the NFC version of the Samsung Galaxy > S II comes already with the SD card slot and here this will be a > question. For the NFC version of the Galaxy S2 it won't change anything either (see below). > I have tried to search for that and even the S2C standard seems to be > relatively old (I think ECMA, 2006) I did not any related materials. > What it means supporting S2C? The NXP544 has the built-in support, but > what about the phone? Should the device have some hardware support > like, e.g. antenna connectors in the slot and on the SD card to be > connected directly to the RF interface? I think you misunderstood the concept of the NFC-WI here. A secure element that uses the NFC wired interface can support two modes: internal and external mode. In external mode, the SE uses the NFC chips (PN544) analog frontend + antenna for communication with RFID readers. In internal mode, the NFC chip accessed the SE as if it were an external contactless smartcard connected to the NFC chip. In either way the NFC-WI is used to transmit a digitized version of the signals that are normally transmitted over the contactless air interface. Thus, the SD card slot would not need some special features like antenna connectors, but it will need some "special" hardware support: To use SD card that support the NFC-WI, the SIGIN and SIGOUT signal lines of the NFC-WI would need to be connected to the NFC chip. But (yes, there's ofthen a but ;-) with the Nexus S (and I expect with the Galaxy S2 too) there is already a secure element connected to the NFC-WI. The Nexus S contains the PN65N (which is a combination of a PN544 and a SmartMX secure element chip). Those two chips are connected through the NFC-WI. br, Michael -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
