General configuration of the Contactless (NFC) interface in poller (reader) mode

Address : 0230 (bank 2, register 30)

Size : 1 byte

Default : 01

Description

Select how the 13.56MHz interface behaves.

Content

Bit	Role	Values
7	Prevent carrier collision (probe the RF field before becoming active)	`0` : Disable carrier collision detection `1` : Enable carrier collision detection
6	RFU
5-4	Tracking policy	`0` : Normal (keep the RF field active and watch the card periodically) `1` : Power saving (reduce the RF field and watch the card periodically) `2` : Low power (shut down the RF field, resume every 0.5 second to look for the card) `3` : Very low power (shut down the RF field, resume every 1.0 second to look for the card)
3-2	Polling policy	`0` : Normal (be a poller all the time) `1` : Power saving (be a poller approx twice per second) `2` : Low power (be a poller approx once per second) `3` : LPCD
1	RFU
0	Be a NFC poller (reader)	`0` : Be a listener `1` : Be a poller (reader)