SWP (Single Wire Protocol)
SWP (Single Wire Protocol), standardized by ETSI, connects a SIM card and an NFC chip.
S2 requires converting the current-domain signal to voltage before probing; choosing the wrong layer (MAC/LLC) fails decode. For channel-prefix differences, see Settings.
Decode Settings
- S1: Voltage-domain signal channel on the DUT.
- S2: Current-domain signal channel; convert to voltage before measuring with the logic analyzer. Field enabled (Enable) when checked. Default: cleared.
- Data Link Layer: Decode by MAC or LLC rules. Default: MAC.
Result
MAC:
LLC:
