pcf2127a NXP Semiconductors, pcf2127a Datasheet - Page 40

• Manufacturer Part Number: pcf2127a
• Description: Integrated Rtc, Tcxo And Quartz Crystal
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF2127A_1
Product data sheet
Repeatedly re-writing these bits has no influence on the functional behavior.
Table 39.
Table 40.
The following tables show what instruction must be sent to clear the appropriate flag.
Table 41.
[1]
Table 42.
[1]
Table 43.
[1]
Table 44.
[1]
Register
Control_2
Register
Control_2
Register
Control_2
Register
Control_2
Register
Control_2
Register
Control_2
The bits labeled as - have to be rewritten with the previous values.
The bits labeled as - have to be rewritten with the previous values.
The bits labeled as - have to be rewritten with the previous values.
The bits labeled as - have to be rewritten with the previous values.
Flag location in register Control_2
Example values in register Control_2
Example to clear only CDTF (bit 3) in register Control_2
Example to clear only AF (bit 4) in register Control_2
Example to clear only MSF (bit 7) in register Control_2
Example to clear both CDTF and MSF in register Control_2
Bit
7
Bit
7
1
Bit
7
1
Bit
7
1
Bit
7
0
Bit
7
0
MSF
Rev. 01 — 21 January 2010
6
WDTF
6
0
6
0
6
0
6
0
6
0
5
TSF2
5
1
5
1
5
1
5
1
5
1
4
AF
4
1
4
1
4
0
4
1
4
1
Integrated RTC, TCXO and quartz crystal
3
CDTF
3
1
3
0
3
1
3
1
3
0
2
-
2
0
2
-
2
0
2
0
2
0
[1]
[1]
[1]
[1]
PCF2127A
© NXP B.V. 2010. All rights reserved.
1
-
1
0
1
-
1
0
1
0
1
0
[1]
[1]
[1]
[1]
0
-
0
0
0
-
0
0
0
0
0
0
[1]
[1]
[1]
[1]
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