Datasheet

PN532_C1 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.6 — 28 November 2017
115436 149 of 222
NXP Semiconductors
PN532/C1
Near Field Communication (NFC) controller
8.6.23.7 CIU_DivIrq register (D5h or 6335h)
Contains miscellaneous interrupt request flags. These bits are latched.
[1] At power-up, after reset modes (including Hard Power Down), the logical value of this bit is undefined.
[2] After Power-Down bit of Table 181 on page 147
goes from logic 1 to logic 0, after pd_rfleveldet bit of
Table 286 on page 188
goes from logic 1 to logic 0, the logical value of this bit is undefined.
Table 186. CIU_DivIrq register (address D5h or 6335h) bit allocation
Bit 7 6 5 4 3 2 1 0
Symbol Set2 - - SiginActIrq ModeIRq CRCIRq RfOnIRq RfOffIRq
Reset 000 X 0 0 X X
Access WRR DY DYDYDYDY
Table 187. Description of CIU_DivIrq bits
Bit Symbol Description
7 Set2 When set to logic level 0 during write operation, the bit set to logic 1 in the
write command are written to logic 0 in the register.
When set to logic level 1 during write operation, the bit set to logic 1 in the
write command are written to logic 1 in the register.
6 to 5 - Reserved.
4 SiginActIrq Set to logic 1, when SIGIN is active. See Section 8.6.13 “
NFC-WI/S
2
C
interface support” on page 123. This interrupt is set to logic 1 when either a
rising or falling edge is detected on SIGIN.
[1]
3 ModeIRq Set to logic level 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 the detected the
communication mode.
Note: The Data Mode Detector is automatically restarted after each RF
reset.
2 CRCIRq Set to logic level 1, when the CRC command is active and all data are
processed.
1 RfOnIRq Set to logic level 1, when an external RF field is detected.
[1][2]
0 RfOffIRq Set to logic level 1, when an present external RF field is switched off.
[1][2]