pcf2123 NXP Semiconductors, pcf2123 Datasheet - Page 18

• Manufacturer Part Number: pcf2123
• Description: Spi Real Time Clock/calendar
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF2123_1
Product data sheet
Table 19.
[1]
Table 20.
[1]
Table 21.
[1]
Bit
7
6
12 hour mode
5
4 to 0
24 hour mode
5 to 0
Bit
7
6
5 to 0
Bit
7
3 to 6
2 to 0
Values shown in decimal.
Values shown in decimal.
Values shown in decimal.
Symbol
AEN_H
-
AMPM
HOUR_ALARM
HOUR_ALARM
Symbol
AEN_D
-
DAY_ALARM
Symbol
AEN_W
-
WEEKDAY_
ALARM
Register Hour_alarm (address 0Ah) bits description
Register Day_alarm (address 0Bh) bits description
Register Weekday_alarm (address 0Ch) bits description
Rev. 01 — 19 November 2008
Value
0
1
-
0
1
01 to 12
00 to 23
Value
0
1
-
01 to 31
Value
0
1
-
0 to 6
[1]
[1]
[1]
[1]
Description
hour alarm is enabled
hour alarm is disabled
unused
indicates AM
indicates PM
this register holds the hour alarm information coded in
BCD format when in 12 hour mode
this register holds the hour alarm information coded in
BCD format when in 24 hour mode
Description
day alarm is enabled
day alarm is disabled
unused
this register holds the day alarm information coded in
BCD format
Description
weekday alarm is enabled
weekday alarm is disabled
unused
this register holds the weekday alarm information
SPI Real time clock/calendar
PCF2123
© NXP B.V. 2008. All rights reserved.
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