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 55 of 120
NXP Semiconductors
MFRC631
High performance ISO/IEC 14443 A/B reader solution
Stores MIFARE Keys into the EEPROM. The key number parameter indicates the first key
(n) in the MKA that will be written. If more than one MIFARE Key is available in the FIFO
then the next key (n+1) will be written until the FIFO is empty. If an incomplete key (less
than 6 bytes) is written into the FIFO, this key will be ignored and will remain in the FIFO.
Abort condition: Insufficient parameter in FIFO; KeyNr is outside the MKA;
8.10.3.15 GetRNR command
Command (1Ch);
This command is reading Random Numbers from the random number generator of the
MFRC631. The Random Numbers are copied to the FIFO until the FIFO is full.
8.10.3.16 SoftReset command
Command (1Fh);
This command is performing a soft reset. Triggered by this command all the default values
for the register setting will be read from the EEPROM and copied into the register set.