PCF2123TS/1.118 NXP Semiconductors, PCF2123TS/1.118 Datasheet - Page 9

• 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
PCF2123
Product data sheet
8.3.1 Register Control_1
8.3 Control registers
Table 5.
[1]
[2]
Bit
7
6
5
4
3
2
1
0
Default value.
For a software reset, 01011000 (58h) must be sent to register Control_1 (see
Symbol
EXT_TEST
N
STOP
SR
N
12_24
CIE
N
Control_1 - control and status register 1 (address 00h) bit description
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 5 October 2010
0
Value
0
1
-
0
1
0
1
-
1
0
1
-
[1]
[1]
[1]
[1]
[1]
Description
normal mode
external clock test mode
unused
the RTC source clock runs
the RTC clock is stopped;
no software reset
initiate software reset
unused
24 hour mode is selected
12 hour mode is selected
no correction interrupt generated
interrupt pulses will be generated at every
correction cycle
unused
RTC divider chain flip-flops are
asynchronously set to logic 0;
CLKOUT at 32.768 kHz, 16.384 kHz or
8.192 kHz is still available
this register will always return a 0 when
read
[2]
;
SPI Real time clock/calendar
Section
PCF2123
© NXP B.V. 2010. All rights reserved.
8.3.1.1).
Reference
Section 8.10
-
Section 8.11
Section 8.3.1.1
-
-
Section 8.9
-
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