PCF2127 查看數據表（PDF） - NXP Semiconductors.
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PCF2127 Datasheet PDF : 101 Pages
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NXP Semiconductors
PCF2127
Accurate RTC with integrated quartz crystal for industrial applications
8.2.2 Register Control_2
Table 8.
Bit
Symbol
Reset
value
Control_2 - control and status register 2 (address 01h) bit allocation
7
6
5
4
3
2
MSF
WDTF
TSF2
AF
CDTF
TSIE
0
0
0
0
0
0
1
0
AIE
CDTIE
0
0
Table 9.
Bit
7
6
5
4
3
2
1
0
Control_2 - control and status register 2 (address 01h) bit description
Symbol
Value
Description
Reference
MSF
0
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
WDTF
0
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)
TSF2
0
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
AF
0
no alarm interrupt generated
Section 8.10.6
1
flag set when alarm triggered;
flag must be cleared to clear interrupt
CDTF
0
no countdown timer interrupt generated
Section 8.11.4
1
flag set when countdown timer interrupt generated;
flag must be cleared to clear interrupt
TSIE
0
no interrupt generated from timestamp flag
Section 8.13.6
1
interrupt generated when timestamp flag set
AIE
0
no interrupt generated from the alarm flag
Section 8.13.5
1
interrupt generated when alarm flag set
CDTIE
0
no interrupt generated from countdown timer flag Section 8.13.2
1
interrupt generated when countdown timer flag set
PCF2127
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 19 December 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
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