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PCF2123TS датащи(PDF) 10 Page - NXP Semiconductors

номер детали PCF2123TS
подробное описание детали  SPI Real time clock/calendar Time keeping application
PDF  63 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF2123TS датащи(HTML) 10 Page - NXP Semiconductors

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PCF2123
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 27 April 2011
10 of 63
NXP Semiconductors
PCF2123
SPI Real time clock/calendar
After reset, the following mode is entered:
• 32.768 kHz on pin CLKOUT active
• 24 hour mode is selected
• Offset register is set to 0
• No alarms set
• Timer disabled
• No interrupts enabled
(1) When CE is inactive, the interface is reset.
Fig 7.
Software reset command
Table 6.
Register reset values
Bits labeled as - are not implemented. Bits labeled as X are undefined at power-on and unchanged
by subsequent resets.
Address
Register name
Bit
7
6
5
4
3
2
1
0
00h
Control_1
00000000
01h
Control_2
00000000
02h
Seconds
1
XXXXXXX
03h
Minutes
-
XXXXXXX
04h
Hours
-
-
XXXXXX
05h
Days
-
-
XXXXXX
06h
Weekdays
-----X
X
X
07h
Months
-
-
-
XXXXX
08h
Years
XXXXXXXX
09h
Minute_alarm
1
XXXXXXX
0Ah
Hour_alarm
1
-
XXXXXX
0Bh
Day_alarm
1
-
XXXXXX
0Ch
Weekday_alarm
1
----X
X
X
0Dh
Offset_register
00000000
0Eh
Timer_clkout
-
0000-
11
0Fh
Countdown_timer
XXXXXXXX
001aai562
addr 00HEX
software reset 58HEX
R/W
b7
0
b6
0
b5
0
b4
1
b3
0
b2
0
b1
0
b0
0
b7
0
b6
1
b5
0
b4
1
b3
1
b2
0
b1
0
b0
0
internal
reset signal
CE
SCL
(1)



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