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PCF85063ATT/AJ 数据表(PDF) 7 Page - NXP Semiconductors

部件名 PCF85063ATT/AJ
功能描述  Tiny Real-Time Clock/calendar with alarm function and I2C-bus
PDF  55 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCF85063ATT/AJ 数据表(HTML) 7 Page - NXP Semiconductors

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NXP Semiconductors
PCF85063A
Tiny Real-Time Clock/calendar with alarm function and I2C-bus
6. Read time registers to see the first change.
7. Apply 64 clock pulses to pin CLKOUT.
8. Read time registers to see the second change.
Repeat 7 and 8 for additional increments.
7.2.1.2 STOP: STOP bit function
The function of the STOP bit (see Figure 6) is to allow for accurate starting of the time circuits. The STOP
bit function causes the upper part of the prescaler (F2 to F14) to be held in reset and thus no 1 Hz ticks are
generated. It also stops the output of clock frequencies below 8 kHz on pin CLKOUT.
aaa-004415
OSCILLATOR
OSCILLATOR STOP
DETECTOR
setting the OS flag
F0
32768 Hz
16384 Hz
8192 Hz
4096 Hz
2 Hz
STOP
1 Hz tick
F1
F2
RESET
F13
RESET
F14
RESET
Figure 6. STOP bit functional diagram
The time circuits can then be set and do not increment until the STOP bit is released (see Figure 7 and Table 6).
Bit
Prescaler bits
Time
STOP
F0F1-F2 to F14
[1]
1 Hz tick
hh:mm:ss
Comment
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
Table 6. First increment of time circuits after STOP bit release
PCF85063A
All information provided in this document is subject to legal disclaimers.
© 2023 NXP B.V. All rights reserved.
Product data sheet
Rev. 7.1 — 8 November 2023
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