pca2125 NXP Semiconductors, pca2125 Datasheet - Page 13

• Manufacturer Part Number: pca2125
• Description: Spi Real Time Clock / Calendar Semiconductors
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA2125_00
Preliminary data sheet
Table 20.
Table 21.
Table 22.
Bit
5 to 0
12 hour mode
5
4 to 0
Bit
7
5 to 0
Bit
7
2 to 0
Fig 8. Alarm function block diagram
Symbol
hour
alarm
am/pm
alarm
hour
alarm
Symbol
AEn
day
alarm
Symbol
AEn
weekday
alarm
Hour alarm (address 0A
Day alarm (address 0B
Weekday alarm (address 0C
check now signal
WEEKDAY ALARM
WEEKDAY TIME
MINUTE ALARM
HOUR ALARM
MINUTE TIME
DAY ALARM
HOUR TIME
DAY TIME
Value
00 to 23
0 to 1
00 to 11
Value
0
1
01 to 31
Value
0
1
0 to 6
Rev. 00.11 — 30 January 2007
Description
this register holds the hour alarm information coded in BCD format
when in 24 hour mode.
this register holds the hour alarm information coded in BCD format
when in 12 hour mode
Description
day alarm is enabled
day alarm is disabled
this register holds the day alarm information coded in BCD format
Description
weekday alarm is enabled
weekday alarm is disabled
this register holds the weekday alarm information
HEX
HEX
=
=
=
=
) bits description
) bits description
HEX
WEEKDAY AEN
MINUTE AEN
HOUR AEN
) bits description
DAY AEN
set alarm flag, AF
SPI Real time clock / calendar
E.G. MINUTE AEN1
001aaf902
1
0
PCA2125
© NXP B.V. 2007. All rights reserved.
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