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PCF85263ATL/A Datasheet(PDF) 58 Page - NXP Semiconductors

Part # PCF85263ATL/A
Description  Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus
PDF  102 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF85263ATL/A Datasheet(HTML) 58 Page - NXP Semiconductors

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NXP Semiconductors
PCF85263A
Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus
Registers labeled as - remain unchanged.
Bit
Address
Register name
7
6
5
4
3
2
1
0
11h to 16h
Timestamp 1
0
0
0
0
0
0
0
0
17h to 1Ch
Timestamp 2
0
0
0
0
0
0
0
0
1Dh to 22h
Timestamp 3
0
0
0
0
0
0
0
0
23h
Timestamp_mode
0
0
0
0
0
0
0
0
24h
Offset
0
0
0
0
0
0
0
0
25h
Oscillator
0
0
0
0
0
0
0
0
26h
Battery_switch
0
0
0
0
0
0
0
0
27h
Pin_IO
0
0
0
0
0
0
0
0
28h
Function
0
0
0
0
0
0
0
0
29h
INTA_enable
0
0
0
0
0
0
0
0
2Ah
INTB_enable
0
0
0
0
0
0
0
0
2Bh
Flags
0
0
0
0
0
0
0
0
2Ch
RAM_byte
0
0
0
0
0
0
0
0
2Dh
Watchdog
0
0
0
0
0
0
0
0
2Fh
Reset
0
0
0
0
0
0
0
0
Table 61. Registers reset values...continued
7.15.2 CPR: Clear prescaler
To set the time for RTC mode accurately or to clear the time in stop-watch mode, the clear prescaler instruction
is needed.
Before sending this instruction, it is recommended to first set stop either by the STOP bit or by the TS pin (see
STOPM bit).
For details, see the STOP definition for an explanation on using this instruction.
7.15.3 CTS: Clear timestamp
The timestamp registers (address 11h to 22h) can be set to all 0 with this instruction.
7.16 Stop_enable register
Bit
Symbol
Value
Description
-
0000 000
Not used
STOP bit
0 [1]
RTC clock runs
7 to 1
0
STOP
1
RTC clock is stopped
Table 62. Stop_enable - control of STOP bit (address 2Eh)
[1]
Default value.
PCF85263A
All information provided in this document is subject to legal disclaimers.
© 2025 NXP B.V. All rights reserved.
Product data sheet
Rev. 5.4 — 12 December 2025
Document feedback
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