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PCF85063ATL/1 데이터시트(PDF) 9 Page - NXP Semiconductors

부품명 PCF85063ATL/1
상세설명  Tiny Real-Time Clock/calendar with alarm function and I2C-bus
PDF  55 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
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NXP Semiconductors
PCF85063A
Tiny Real-Time Clock/calendar with alarm function and I2C-bus
7.2.1.3 Software reset
A reset is automatically generated at power-on. There is a low probability that some devices will have corruption
of the registers after the automatic power-on reset if the device is powered up with a residual VDD level. It is
required that the VDD starts at zero volts at power up or upon power cycling to ensure that there is no corruption
of the registers. If this is not possible, a reset must be initiated after power-up (i.e. when power is stable) with
the software reset command. Software reset command means setting bits 6, 4, and 3 in register Control_1 (00h)
logic 1 and all other bits logic 0 by sending the bit sequence 01011000 (58h), see Figure 8.
s
1
0
1
0
0
0 1
0
A 0
0
0
0
0
0
0
0
A 0 1
0
1
1
0
0
0
A P/S
SDA
SCL
slave address
address 00h
software reset 58h
R/W
aaa-004418
internal
reset signal
After sending the software reset command, it is recommended to re-initialize the interface by a STOP and START.
Figure 8. Software reset command
In reset state, all registers are set according to Table 7 and the address pointer returns to address 00h.
Bit
Address
Register name
7
6
5
4
3
2
1
0
00h
Control_1
0
0
0
0
0
0
0
0
01h
Control_2
0
0
0
0
0
0
0
0
02h
Offset
0
0
0
0
0
0
0
0
03h
RAM_byte
0
0
0
0
0
0
0
0
04h
Seconds
1
0
0
0
0
0
0
0
05h
Minutes
0
0
0
0
0
0
0
0
06h
Hours
0
0
0
0
0
0
0
0
07h
Days
0
0
0
0
0
0
0
1
08h
Weekdays
0
0
0
0
0
1
1
0
09h
Months
0
0
0
0
0
0
0
1
0Ah
Years
0
0
0
0
0
0
0
0
0Bh
Second_alarm
1
0
0
0
0
0
0
0
0Ch
Minute_alarm
1
0
0
0
0
0
0
0
0Dh
Hour_alarm
1
0
0
0
0
0
0
0
0Eh
Day_alarm
1
0
0
0
0
0
0
0
0Fh
Weekday_alarm
1
0
0
0
0
0
0
0
10h
Timer_value
0
0
0
0
0
0
0
0
Table 7. Registers reset values
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
9 / 55



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