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PCF2123 数据表(PDF) 28 Page - NXP Semiconductors

部件名 PCF2123
功能描述  Nano-power highly accurate RTC with integrated quartz crystal for automotive applications
PDF  86 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCF2123 数据表(HTML) 28 Page - NXP Semiconductors

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NXP Semiconductors
PCA2131
Nano-power highly accurate RTC with integrated quartz crystal for automotive applications
Upper-digit (ten’s place)
Digit (unit place)
Seconds
value in
decimal
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
:
:
:
:
:
:
:
:
58
1
0
1
1
0
0
0
59
1
0
1
1
0
0
1
Table 30. Seconds coded in BCD format...continued
7.9.3 Register Minutes
Bits labeled as T are unused and return 0 when read
Bit
7
6
5
4
3
2
1
0
Symbol
T
MINUTES (0 to 59)
Reset
value
0
0
0
0
0
0
0
0
Table 31. Minutes - minutes register (address 08h) bit allocation
Bits labeled as T are unused and return 0 when read
Bit
Symbol
Value
Place value Description
7
T
0
-
unused
6 to 4
0 to 5
ten’s place
3 to 0
MINUTES
0 to 9
unit place
actual minutes coded in BCD format
Table 32. Minutes - minutes register (address 08h) bit description
7.9.4 Register Hours
Bits labeled as T are unused and return 0 when read
Bit
7
6
5
4
3
2
1
0
AMPM
HOURS (1 to 12) in 12-hour mode
Symbol
T
T
HOURS (0 0to 23) in 24-hour mode
Reset
value
0
0
0
0
0
0
0
0
Table 33. Hours - hours register (address 09h) bit allocation
Bits labeled as T are unused and return 0 when read
Bit
Symbol
Value
Place value Description
7 to 6
T
00
-
unused
12-hour mode[1]
0
-
indicates AM
5
AMPM
1
-
indicates PM
Table 34. Hours - hours register (address 09h) bit description
PCA2131
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 1.0 — 26 July 2021
28 / 86



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