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 31 of 120
NXP Semiconductors
MFRC631
High performance ISO/IEC 14443 A/B reader solution
The bit HiAlert is set to logic 1 if maximum water level bytes (as set in register WaterLevel)
or less can be stored in the FIFO-buffer. It is generated according to the following
equation:
(2)
The bit LoAlert is set to logic 1 if water level bytes (as set in register WaterLevel) or less
are actually stored in the FIFO-buffer. It is generated according to the following equation:
(3)
HiAlert FiFoSize FiFoLength– WaterLevel=
LoAlert FIFOLength WaterLevel=