PCF2123TS/1.118 NXP Semiconductors, PCF2123TS/1.118 Datasheet - Page 8

• Manufacturer Part Number: PCF2123TS/1.118
• Manufacturer: NXP Semiconductors

Specifications of PCF2123TS/1.118

• Bus Type: Serial (3-Wire, SPI)
• Package Type: TSSOP
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Mounting: Surface Mount
• Date Format: DW:DM:M:Y
• Time Format: HH:MM:SS
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
Table 4.
Bit positions labelled as - are not implemented and will return a 0 when read. The bit position labelled as -- is not implemented
and will return a 0 or 1 when read. Bit positions labelled with N should always be written with logic 0
[1]
PCF2123
Product data sheet
Address
Control and status registers
00h
01h
Time and date registers
02h
03h
04h
05h
06h
07h
08h
Alarm registers
09h
0Ah
0Bh
0Ch
Offset register
0Dh
Timer registers
0Eh
0Fh
Except in the case of software reset, see
Register name
Control_1
Control_2
Seconds
Minutes
Hours
Days
Weekdays
Months
Years
Minute_alarm
Hour_alarm
Day_alarm
Weekday_alarm
Offset_register
Timer_clkout
Countdown_timer
Registers overview
8.2 Register overview
16 registers are available. The time registers are encoded in the Binary Coded Decimal
(BCD) format to simplify application use. Other registers are either bit-wise or standard
binary.
Bit
7
EXT_TEST
MI
OS
--
-
-
-
-
YEARS (0 to 99)
AE_M
AE_H
AE_D
AE_W
MODE
-
COUNTDOWN_TIMER[7:0]
Section
All information provided in this document is subject to legal disclaimers.
6
N
SI
SECONDS (0 to 59)
MINUTES (0 to 59)
-
-
-
-
MINUTE_ALARM (0 to 59)
-
-
-
OFFSET[6:0]
COF[2:0]
8.3.1.1.
Rev. 03 — 5 October 2010
DAYS (1 to 31)
-
5
STOP
MSF
AMPM
HOURS (0 to 23) in 24 h mode
-
-
AMPM
HOUR_ALARM (0 to 23) in 24 h mode
DAY_ALARM (1 to 31)
4
SR
TI_TP
HOURS (1 to 12) in 12 h mode
-
MONTHS (1 to 12)
HOUR_ALARM (1 to 12) in 12 h mode
-
3
N
AF
-
-
TE
SPI Real time clock/calendar
2
12_24
TF
WEEKDAYS (0 to 6)
WEEKDAY_ALARM (0 to 6)
-
[1]
.
1
CIE
AIE
CTD[1:0]
PCF2123
© NXP B.V. 2010. All rights reserved.
0
N
TIE
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