Datasheet

PN512 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 5.2 — 16 June 2016
111352 28 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
8.2.1.6 DivIRqReg
Contains Interrupt Request bits
Table 27. DivIRqReg register (address 05h); reset value: XXh, 000X00XXb
7 6 5 4 3 2 1 0
Set2 0 0 SiginActIRq ModeIRq CRCIRq RFOnIRq RFOffIRq
Access
Rights
wRFURFU dy dy dy dy dy
Table 28. Description of DivIRqReg bits
All bits in the register DivIRqReg shall be cleared by software.
Bit Symbol Description
7 Set2 Set to logic 1, Set2 defines that the marked bits in the register
DivIRqReg are set.
Set to logic 0, Set2 defines, that the marked bits in the register
DivIRqReg are cleared
6 to 5 - Reserved for future use.
4 SiginActIRq Set to logic 1, when SIGIN is active. See Section 11.6 “
S
2
C interface
support”. This interrupt is set when either a rising or falling signal edge
is detected.
3 ModeIRq Set to logic 1, when the mode has been detected by the Data mode
detector.
Note: The Data mode detector can only be activated by the AutoColl
command and is terminated automatically having detected the
Communication mode.
Note: The Data mode detector is automatically restarted after each RF
Reset.
2 CRCIRq Set to logic 1, when the CRC command is active and all data are
processed.
1 RFOnIRq Set to logic 1, when an external RF field is detected.
0 RFOffIRq Set to logic 1, when a present external RF field is switched off.