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PCF2127AT/1 bảng dữ liệu(PDF) 44 Page - NXP Semiconductors

tên linh kiện PCF2127AT/1
Giải thích chi tiết về linh kiện  Integrated RTC, TCXO and quartz crystal
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PCF2127AT/1 bảng dữ liệu(HTML) 44 Page - NXP Semiconductors

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PCF2127A_2
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 02 — 7 May 2010
44 of 80
NXP Semiconductors
PCF2127A
Integrated RTC, TCXO and quartz crystal
8.12.4 Dependency between Battery switch-over and timestamp
The timestamp function depends on the control bit BTSE in register Control_3:
[1]
Default value.
Table 52.
Battery switch-over and timestamp
BTSE BF
Description
0-
[1]
the battery switch-over does not affect the timestamp registers
1
If a battery switch-over event occurs:
0
[1]
the timestamp registers store the time and date when the switch-over occurs;
after this event occurred BF is set logic 1
1
the timestamp registers are not modified;
in this condition subsequent battery switch-over events or falling edges on pin
TS are not registered



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