PCF8523 NXP [NXP Semiconductors], PCF8523 Datasheet - Page 42

• Manufacturer Part Number: PCF8523
• Description: Real-Time Clock (RTC) and calendar
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
Table 43.
[1]
PCF8523
Product data sheet
Bit
STOP
Clock is running normally
0
STOP is activated by user; F
1
New time is set by user
1
STOP is released by user
0
0
0
0
:
0
0
0
:
0
0
:
0
0
F
0
is clocked at 32.768 kHz.
Prescaler bits
F
01-0000111010100
XX-0000000000000
XX-0000000000000
XX-0000000000000
XX-1000000000000
XX-0100000000000
XX-1100000000000
:
11-1111111111110
00-0000000000001
10-0000000000001
:
11-1111111111111
00-0000000000000
:
11-1111111111110
00-0000000000001
First increment of time circuits after stop release
0
F
1
-F
2
to F
14
[1]
0
F
1
are not reset and values cannot be predicted externally
1 Hz tick
013aaa337
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 March 2011
Time
hh:mm:ss
12:45:12
12:45:12
08:00:00
08:00:00
08:00:00
08:00:00
08:00:00
:
08:00:00
08:00:01
08:00:01
:
08:00:01
08:00:01
:
08:00:01
08:00:02
Comment
prescaler counting normally
prescaler is reset; time circuits are frozen
prescaler is reset; time circuits are frozen
prescaler is now running
-
-
-
:
-
0 to 1 transition of F14 increments the time circuits
-
:
-
-
:
-
0 to 1 transition of F14 increments the time circuits
Real-Time Clock (RTC) and calendar
PCF8523
© NXP B.V. 2011. All rights reserved.
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