Single Wire Protocol

URL : http://en.wikipedia.org/wiki/Single_Wire_Protocol

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The Single Wire Protocol (SWP) is a specification for a single-wire connection between the SIM card and a near field communication (NFC) chip in a cell phone. It is currently under final review by the European Telecommunications Standards Institute (ETSI).^[1][2]

SWP is an interface between Contactless frontend (CLF) and UICC. It is a contact based protocol which is used for contactless communication. C6 pin of UICC is connected to CLF for SWP support. It is a bit oriented full duplex protocol i.e at the same time transmission as well as reception is possible. CLF acts as a master and UICC as a slave. CLF provides the UICC with energy, a transmission clock, data and signal for bus management. The data to be transmitted are represented by the binary states of voltage and current on the single wire.

See also

• 1-Wire
• NFC-WI

Sources

1. ETSI SCP Activity Report 2007.^[3]
2. The Register, The future of the SIM hangs by a single Wire 2008.^[4]
3. GSM Association: Requirements For SWP NFC Handsets V2 2008.^[5]
4. Fast Company: Nokia's 2011 Smartphones Have Built-In Wireless Payment Tech: Take That, Apple!^[6]

References

1. Jump up ^ ETSI TS 102 613 V.9.1.0
2. Jump up ^ ETSI TS 102 622 V.10.1.0
3. Jump up ^ http://portal.etsi.org/scp/activityreport2007.asp
4. Jump up ^ http://www.theregister.co.uk/2008/02/14/swp_sim_nfc/
5. Jump up ^ http://www.gsmworld.com/documents/reqs_swp_nfc_handsets_v2.pdf
6. Jump up ^ http://www.fastcompany.com/1661488/nokias-2011-smartphones-have-built-wireless-payment-tech-take-apple