Non-volatile memory Configuration Contactless NFC-B specific options
April 4, 2024 at 3:01 AMNFC-B specific options
Address : 023B (bank 2, register 3B)
Size : 2 bytes
Default : 0000
Content
Byte 0 : Options
| Bit | Role | Values |
|---|---|---|
| 7 | NFC Forum polling: discard NFC-B polling for reactivation feature | 0 : Disabled1 : Enabled |
| 6 | NFC Forum polling: bail-out after NFC-B response | 0 : Disabled1 : Enabled |
| 5-2 | RFU | |
| 1 | Control whether NFC-B polling loop implements Apple Enhanced Contactless Polling | 0 : ECP is disabled1 : ECP is enabled |
| 0 | Control whether NFC-B uses extended ATQB or not | 0 : Short ATQB requested in REQB/WUPB1 : Extended ATQB requested in REQB/WUPB |
Remarks
Bit 1: Control whether NFC-B polling loop implements Apple Enhanced Contactless Polling
Only ECP v2 is supported with NFC-B. Register 0239 shall be set accordingly.
Byte 1 : AFI for NFC-B polling
The AFI (Application Family IDentifier) is a parameter broadcasted by the reader within its NFC-B REQB/WUPB polling frames.
A card that does not belong to the specified Application Family remains silent (this aims to speed-up the anti-collision loop and avoid the reader to initiate a transaction with “useless” cards).
Remark : Set to 00 to target all cards (default)