Product data

MFRC631 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.3 — 4 February 2014
227433 67 of 120
NXP Semiconductors
MFRC631
High performance ISO/IEC 14443 A/B reader solution
9.6.3 RxBitCtrl
Receiver control register.
Table 63. Status register (address 0Bh)
Bit 7 6 5 4 3 2 1 0
Symbol - - Crypto1On - - ComState
Access
rights
RFURFU dy RFURFU r
Table 64. Status bits
Bit Symbol Description
7to 6 - RFU
5 Crypto1On Indicates if the MIFARE Crypto is on. Clearing this bit is switching the
MIFARE Crypto off. The bit can only be set by the MFAuthent command.
4to3 - RFU
2 to 0 ComState ComState shows the status of the transmitter and receiver state machine:
000b ... Idle
001b ... TxWait
011b ... Transmitting
101b ... RxWait
110b ... Wait for data
111b ... Receiving
100b ... not used
Table 65. RxBitCtrl register (address 0Ch);
Bit 7 6 5 4 3 2 1 0
Symbol ValuesAfterColl RxAlign NoColl RxLastBits
Access
rights
r/w r/w r/w w
Table 66. RxBitCtrl bits
Bit Symbol Description
7 ValuesAfter
Coll
If cleared, every received bit after a collision is replaced by a zero. This
function is needed for ISO/IEC14443 anticollision