PC8523-1 데이터 시트보기 (PDF) - NXP Semiconductors.
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PC8523-1 Datasheet PDF : 78 Pages
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NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
8.3 Reset
A reset is automatically generated at power-on. A reset can also be initiated 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 7.
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Fig 7. Software reset command
DDD
Table 10. Register reset values
Bits labeled X are undefined at power-on and unchanged by subsequent resets. Bits labeled - are
not implemented.
Address Register name
Bit
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
Control_3
1
1
1
-
0
0
0
0
03h
Seconds
1
X
X
X
X
X
X
X
04h
Minutes
-
X
X
X
X
X
X
X
05h
Hours
-
-
X
X
X
X
X
X
06h
Days
-
-
X
X
X
X
X
X
07h
Weekdays
-
-
-
-
-
X
X
X
08h
Months
-
-
-
X
X
X
X
X
09h
Years
X
X
X
X
X
X
X
X
0Ah
Minute_alarm
1
X
X
X
X
X
X
X
0Bh
Hour_alarm
1
-
X
X
X
X
X
X
0Ch
Day_alarm
1
-
X
X
X
X
X
X
0Dh
Weekday_alarm
1
-
-
-
-
X
X
X
0Eh
Offset
0
0
0
0
0
0
0
0
0Fh
Tmr_CLKOUT_ctrl 0
0
0
0
0
0
0
0
10h
Tmr_A_freq_ctrl
-
-
-
-
-
1
1
1
11h
Tmr_A_reg
X
X
X
X
X
X
X
X
12h
Tmr_B_freq_ctrl
-
0
0
0
-
1
1
1
13h
Tmr_B_reg
X
X
X
X
X
X
X
X
PCF8523
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 7 — 28 April 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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