pca2125 NXP Semiconductors, pca2125 Datasheet - Page 6

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

NXP Semiconductors
Table 5:
Bit positions labelled as x are not implemented and will return a 0 when read. Bit positions labelled with 0 should always be
written with logic 0.
PCA2125_00
Preliminary data sheet
Address
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
HEX
HEX
HEX
HEX
HEX
HEX
HEX
HEX
HEX
HEX
HEX
HEX
HEX
HEX
HEX
HEX
Registers overview
Register name
control 1
control 2
seconds
minutes
hours
days
weekdays
months
years
minute alarm
hour alarm
day alarm
weekday alarm
CLKOUT control
timer control
countdown timer
6.1 Register overview
16 registers are available. The time registers are encoded in the binary coded decimal
format (BCD) to simplify application use. Other registers are either bit-wise or standard
binary.
ext test
Bit 7
AEn
AEn
AEn
AEn
RF
TE
MI
x
x
x
x
x
x
Bit 6
Rev. 00.11 — 30 January 2007
SI
0
x
x
x
x
x
x
x
x
x
10 years
10 minute alarm
10 seconds
10 minutes
AMPM / 10 hours
Bit 5
MSF
AMPM / 10 hour
stop
10 day alarm
x
x
x
x
x
10 days
alarm
countdown timer value, n
10months
TI/TP
Bit 4
0
x
x
x
x
POR ovrd
Bit 3
AF
x
x
x
x
SPI Real time clock / calendar
COF2
12/24
Bit 2
TF
minute alarm
x
hour alarm
day alarm
seconds
minutes
months
hours
years
days
weekday alarm
weekdays
PCA2125
© NXP B.V. 2007. All rights reserved.
COF1
CTD1
Bit 1
AIE
0
COF0
CTD0
Bit 0
TIE
0
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