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PCF85363ATL/A 데이터시트(PDF) 11 Page - NXP Semiconductors

부품명 PCF85363ATL/A
상세설명  Tiny Real-Time Clock/calendar with 64 byte RAM, alarm function, battery switch-over time stamp input, and I2C-bus
PDF  86 Pages
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제조업체  NXP [NXP Semiconductors]
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NXP Semiconductors
PCF85363A
Tiny Real-Time Clock/calendar with 64 byte RAM, alarm function, battery switch-over time stamp input,
and I2C-bus
Upper-digit (ten’s place)
Digit (unit place)
Value in
decimal
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
00
0
0
0
0
0
0
0
0
01
0
0
0
1
0
0
0
1
02
0
0
1
0
0
0
1
0
:
:
:
:
:
:
:
:
:
09
1
0
0
1
1
0
0
1
10
0
0
0
0
0
0
0
0
:
:
:
:
:
:
:
:
:
98
1
0
0
1
1
0
0
0
99
1
0
0
1
1
0
0
1
Table 8. BCD coding
7.2.2 OS: Oscillator stop
When the oscillator of the PCF85363A is stopped, the OS status bit is set. The oscillator
can be stopped, for example, by connecting one of the oscillator pins OSCI or OSCO to
ground. The oscillator is considered to be stopped during the time between power-on and
stable crystal resonance. This time can be in the range of 200 ms to 2 s depending on
crystal type, temperature, and supply voltage.
The status bit remains set until cleared by command (see Figure 8). If the bit cannot
be cleared, then the oscillator is not running. This method can be used to monitor the
oscillator and to determine if the supply voltage has reduced to the point where oscillation
fails.
aaa-009576
t
OS = 1 and bit can not be cleared
VDD
oscillation
oscillation now stable
OS bit cleared
by software
OS bit set when
oscillation stops
OS flag
OS = 1 and bit can be cleared
Figure 8. OS status bit
7.2.3 EMON: event monitor
The EMON can be used to monitor the status of all the flags in the Flags register, see
Section 7.14. When one or more of the flags is set, then the EMON bit returns a logic 1.
The EMON bit cannot be cleared. EMON returns a logic 0 when all flags are cleared.
See Figure 21 for a pictorial representation.
PCF85363A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 3.1 — 18 June 2021
11 / 86



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