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 was under final review by the European Telecommunications Standards Institute (ETSI) . SWP is an interface between contactless frontend (CLF) and universal integrated circuit card (UICC/SIM card chip). It is a contact-based protocol that 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. transmission and reception are possible at the same time. CLF acts as a master, and UICC as a slave. CLF provides the UICC with energy, a transmission clock, data, and a signal for bus management. The data to be transmitted are represented by the binary states of voltage and current on the single wire.
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 was under final review by the European Telecommunications Standards Institute (ETSI) . SWP is an interface between contactless frontend (CLF) and universal integrated circuit card (UICC/SIM card chip). It is a contact-based protocol that 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. transmission and reception are possible at the same time. CLF acts as a master, and UICC as a slave. CLF provides the UICC with energy, a transmission clock, data, and a 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 wired interface HCI
Sources
ETSI SCP Activity Report 2007. The Register, The future of the SIM hangs by a single Wire 2008. GSM Association: Requirements For SWP NFC Handsets V2 2008. Fast Company: Nokia's 2011 Smartphones Have Built-In Wireless Payment Tech: Take That, Apple!
References
Text derived from https://en.wikipedia.org/w/index.php?oldid=1340134163 under CC BY-SA 4.0; modifications have been made.