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PCF2123TS датащи(PDF) 12 Page - NXP Semiconductors

номер детали PCF2123TS
подробное описание детали  SPI Real time clock/calendar
PDF  55 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF2123TS датащи(HTML) 12 Page - NXP Semiconductors

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PCF2123_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 4 December 2009
12 of 55
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 10. Software reset command
Table 7.
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
0
0
0
0
0
0
0
0
01h
Control_2
0
0
0
0
0
0
0
0
02h
Seconds
1
X
X
X
X
X
X
X
03h
Minutes
-
X
X
X
X
X
X
X
04h
Hours
-
-
X
X
X
X
X
X
05h
Days
-
-
X
X
X
X
X
X
06h
Weekdays
-
-
-
-
-
X
X
X
07h
Months
-
-
-
X
X
X
X
X
08h
Years
X
X
X
X
X
X
X
X
09h
Minute_alarm
1
X
X
X
X
X
X
X
0Ah
Hour_alarm
1
-
X
X
X
X
X
X
0Bh
Day_alarm
1
-
X
X
X
X
X
X
0Ch
Weekday_alarm
1
-
-
-
-
X
X
X
0Dh
Offset_register
0
0
0
0
0
0
0
0
0Eh
Timer_clkout
-
0
0
0
0
-
1
1
0Fh
Countdown_timer
X
X
X
X
X
X
X
X
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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