PCF2123TS/1,112 NXP Semiconductors, PCF2123TS/1,112 Datasheet - Page 26
![IC SPI RTC/CALENDAR 14-TSSOP](/photos/6/58/65814/568-14-tssop_sot402-1_sml.jpg)
PCF2123TS/1,112
Manufacturer Part Number
PCF2123TS/1,112
Description
IC SPI RTC/CALENDAR 14-TSSOP
Manufacturer
NXP Semiconductors
Type
Clock/Calendar/Alarmr
Specifications of PCF2123TS/1,112
Package / Case
14-TSSOP
Time Format
HH:MM:SS (12/24 hr)
Date Format
YY-MM-DD-dd
Interface
SPI, 3-Wire Serial
Voltage - Supply
1.1 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Function
Clock, Calendar
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.1 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Rtc Bus Interface
Serial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Memory Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
935286384112
PCF2123TS/1
PCF2123TS/1
PCF2123TS/1
PCF2123TS/1
NXP Semiconductors
PCF2123
Product data sheet
Fig 16. Interrupt scheme
COUNTDOWN COUNTER
When bits SI, MI, TIE, AIE and CIE are all disabled, pin INT will remain high-impedance.
SECONDS COUNTER
MINUTES COUNTER
8.7 Interrupt output
TE
offset circuit: add/substract
An active LOW interrupt signal is available at pin INT. Operation is controlled via the bits
of register Control_2. Interrupts may be sourced from four places: second and minute
timer, countdown timer, alarm function or offset function.
With bit TI_TP, the timer generated interrupts can be configured to either generate a pulse
or to follow the status of the interrupt flags (bits TF and MSF). Correction interrupt pulses
are always
Remark: Note that the interrupts from the four sources are wired-OR, meaning they will
mask one another (see
from interface:
from interface:
from interface:
from interface:
1/64 Hz pulse
clear MSF
set alarm
clear TF
clear AF
flag, AF
set CIE
MI
SI
1
128
All information provided in this document is subject to legal disclaimers.
second long. Alarm interrupts always follow the condition of AF.
SET
SET
SET
SECOND FLAG
MSF: MINUTE
AF: ALARM
TF: TIMER
Rev. 4 — 22 December 2010
CLEAR
CLEAR
CLEAR
FLAG
Figure
16).
TRIGGER
TRIGGER
TRIGGER
GENERATOR 1
GENERATOR 2
GENERATOR 3
PULSE
CLEAR
PULSE
CLEAR
CLEAR
PULSE
to interface:
read MSF
to interface:
read TF
to interface:
read AF
TI_TP
0
1
0
1
SPI Real time clock/calendar
SI
CIE
TIE
AIE
MI
PCF2123
© NXP B.V. 2010. All rights reserved.
E.G.AIE
001aai555
INT
0
1
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