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PCF2127AT/1 датащи(PDF) 28 Page - NXP Semiconductors

номер детали PCF2127AT/1
подробное описание детали  Integrated RTC, TCXO and quartz crystal
PDF  80 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF2127AT/1 датащи(HTML) 28 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
28 of 80
NXP Semiconductors
PCF2127A
Integrated RTC, TCXO and quartz crystal
8.9 Time and date function
The majority of these registers are coded in the Binary Coded Decimal (BCD) format.
8.9.1 Register Seconds
[1]
Start-up value.
8.9.2 Register Minutes
Table 19.
Seconds - seconds and clock integrity register (address 03h) bit description
Bit
Symbol
Value
Place value Description
7
OSF
0
-
clock integrity is guaranteed
1[1]
-
clock integrity is not guaranteed:
oscillator has stopped and chip reset
has occurred since flag was last cleared
6 to 4 SECONDS
0 to 5
ten’s place
actual seconds coded in BCD format
3to0
0to9
unit place
Table 20.
Seconds coded in BCD format
Seconds value in
decimal
Upper-digit (ten’s place)
Digit (unit place)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
00
000
0000
01
000
0001
02
000
0010
:
:::
::::
09
000
1001
10
001
0000
:
:::
::::
58
101
1000
59
101
1001
Table 21.
Minutes - minutes register (address 04h) bit description
Bit
Symbol
Value
Place value Description
7
-
-
-
unused
6 to 4 MINUTES
0 to 5
ten’s place
actual minutes coded in BCD format
3to0
0to9
unit place



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