The ISO 15693-2 specifies in section 7.2 that a VCD (reader) shall determine the data coding mode by appropriately encoding the Start-of-Frame (SOF).
How does one determine which of the two modes ("1 out of 256" and "1 out of 4") is used and how this can be changed?
PS: A pointer to Android source where this is done would be highly appreciated.
The NFC hardware in the Google Nexus devices does not support both modes, so you cannot configure this. It can actually only detect one card at a time.