Datasheet

PCF2127AT All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 11 July 2013 11 of 86
NXP Semiconductors
PCF2127AT
Integrated RTC, TCXO and quartz crystal
8.2.2 Register Control_2
[1] Default value.
Table 7. Control_2 - control and status register 2 (address 01h) bit description
Bit Symbol Value Description Reference
7MSF 0
[1]
no minute or second interrupt generated Section 8.13
1 flag set when minute or second interrupt
generated;
flag must be cleared to clear interrupt
6WDTF 0
[1]
no watchdog timer interrupt or reset
generated
Section 8.13.4
1 flag set when watchdog timer interrupt or
reset generated;
flag cannot be cleared by command
(read-only)
5TSF2 0
[1]
no timestamp interrupt generated Section 8.12.1
1 flag set when TS input is driven to ground;
flag must be cleared to clear interrupt
4AF 0
[1]
no alarm interrupt generated Section 8.10.6
1 flag set when alarm triggered;
flag must be cleared to clear interrupt
3 CDTF 0
[1]
no countdown timer interrupt generated Section 8.11.4
1 flag set when countdown timer interrupt
generated;
flag must be cleared to clear interrupt
2TSIE 0
[1]
no interrupt generated from timestamp flag Section 8.13.6
1 interrupt generated when timestamp flag set
1AIE 0
[1]
no interrupt generated from the alarm flag Section 8.13.5
1 interrupt generated when alarm flag set
0 CDTIE 0
[1]
no interrupt generated from countdown timer
flag
Section 8.13.2
1 interrupt generated when countdown timer
flag set