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PCF8563P/F4 Fiches technique(PDF) 21 Page - NXP Semiconductors

No de pièce PCF8563P/F4
Description  Real-time clock/calendar
PDF  50 Pages
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Fabricant  NXP [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8563P/F4 Fiches technique(HTML) 21 Page - NXP Semiconductors

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PCF8563
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 10 — 3 April 2012
21 of 50
NXP Semiconductors
PCF8563
Real-time clock/calendar
[1]
F0 is clocked at 32.768 kHz.
The first increment of the time circuits is between 0.507813 s and 0.507935 s after STOP
bit is released. The uncertainty is caused by the prescaler bits F0 and F1 not being reset
(see Table 26) and the unknown state of the 32 kHz clock.
Table 26.
First increment of time circuits after STOP bit release
Bit
Prescaler bits
[1]
1Hz tick
Time
Comment
STOP
F0F1-F2 to F14
hh:mm:ss
Clock is running normally
0
01-0 0001 1101 0100
12:45:12
prescaler counting normally
STOP bit is activated by user. F0F1 are not reset and values cannot be predicted externally
1
XX-0 0000 0000 0000
12:45:12
prescaler is reset; time circuits are frozen
New time is set by user
1
XX-0 0000 0000 0000
08:00:00
prescaler is reset; time circuits are frozen
STOP bit is released by user
0
XX-0 0000 0000 0000
08:00:00
prescaler is now running
XX-1 0000 0000 0000
08:00:00
-
XX-0 1000 0000 0000
08:00:00
-
XX-1 1000 0000 0000
08:00:00
-
:
::
11-1 1111 1111 1110
08:00:00
-
00-0 0000 0000 0001
08:00:01
0 to 1 transition of F14 increments the time circuits
10-0 0000 0000 0001
08:00:01
-
:
::
11-1 1111 1111 1111
08:00:01
-
00-0 0000 0000 0000
08:00:01
-
10-0 0000 0000 0000
08:00:01
-
:
::
11-1 1111 1111 1110
08:00:01
-
00-0 0000 0000 0001
08:00:02
0 to 1 transition of F14 increments the time circuits
013aaa076



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