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 8 of 120
NXP Semiconductors
MFRC631
High performance ISO/IEC 14443 A/B reader solution
Table 4. Interrupt sources
Interrupt bit Interrupt source Is set automatically, when
Timer0Irq Timer Unit the timer register T0 CounterVal underflows
Timer1Irq Timer Unit the timer register T1 CounterVal underflows
Timer2Irq Timer Unit the timer register T2 CounterVal underflows
Timer3Irq Timer Unit the timer register T3 CounterVal underflows
TxIrq Transmitter a transmitted data stream ends
RxIrq Receiver a received data stream ends
IdleIrq Command Register a command execution finishes
HiAlertIrq FIFO-buffer pointer the FIFO data number has reached the top level as
configured by the bit WaterLevel
LoAlertIrq FIFO-buffer pointer the FIFO data number has reached the bottom level as
configured by the bit WaterLevel
ErrIrq contactless UART a communication error had been detected
LPCDIrq LPCD a card was detected when in low-power card detection
mode
RxSOFIrq Receiver detection of a SOF or a subcarrier
GlobalIrq all interrupt sources will be set if another interrupt request source is set