PCF2123U/5GA/1 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF2123U/5GA/1' PDF : 63 Pages View PDF
NXP Semiconductors
PCF2123
SPI Real time clock/calendar
Table 41. First increment of time circuits after STOP bit release
Bit
Prescaler bits[1] 1 Hz tick
Time
Comment
STOP F0F1-F2 to F14
Clock is running normally
hh:mm:ss
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
10-0 0000 0000 0001
08:00:01
08:00:01
0 to 1 transition of F14 increments the time circuits
-
:
:
:
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
013aaa352
[1] F0 is clocked at 32.768 kHz.
PCF2123
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 15 July 2013
© NXP B.V. 2013. All rights reserved.
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