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PCF8523TS/1 Datasheet(PDF) 44 Page - NXP Semiconductors

Part # PCF8523TS/1
Description  Real-Time Clock (RTC) and calendar
PDF  75 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8523TS/1 Datasheet(HTML) 44 Page - NXP Semiconductors

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PCF8523
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 5 July 2012
44 of 74
NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
[1]
F0 is clocked at 32.768 kHz.
Table 45.
First increment of time circuits after STOP release
Bit
Prescaler bits[1]
1Hz tick
Time
Comment
STOP
F0F1-F2 to F14
hh:mm:ss
Clock is running normally
0
01-0000111010100
12:45:12
prescaler counting normally
STOP is activated by user; F0F1 are not reset and values cannot be predicted externally
1
XX-0000000000000
12:45:12
prescaler is reset; time circuits are frozen
New time is set by user
1
XX-0000000000000
08:00:00
prescaler is reset; time circuits are frozen
STOP is released by user
0
XX-0000000000000
08:00:00
prescaler is now running
0
XX-1000000000000
08:00:00
-
0
XX-0100000000000
08:00:00
-
0
XX-1100000000000
08:00:00
-
::
:
:
0
11-1111111111110
08:00:00
-
0
00-0000000000001
08:00:01
0 to 1 transition of F14 increments the time circuits
0
10-0000000000001
08:00:01
-
::
:
:
0
11-1111111111111
08:00:01
-
0
00-0000000000000
08:00:01
-
::
:
:
0
11-1111111111110
08:00:01
-
0
00-0000000000001
08:00:02
0 to 1 transition of F14 increments the time circuits
013aaa337



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