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PCF2123TS датащи(PDF) 55 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) 55 Page - NXP Semiconductors

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NXP Semiconductors
PCF2123
SPI Real time clock/calendar
© NXP B.V. 2009.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 4 December 2009
Document identifier: PCF2123_2
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
24. Contents
1
General description . . . . . . . . . . . . . . . . . . . . . . 1
2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
4
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
5
Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
6
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
7
Pinning information . . . . . . . . . . . . . . . . . . . . . . 4
7.1
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
7.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
8
Device protection diagram . . . . . . . . . . . . . . . . 5
9
Functional description . . . . . . . . . . . . . . . . . . . 6
9.1
Low power operation. . . . . . . . . . . . . . . . . . . . . 6
9.1.1
Power consumption with respect to
quartz series resistance . . . . . . . . . . . . . . . . . . 6
9.1.2
Power consumptions with respect to
timer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
9.2
Register overview . . . . . . . . . . . . . . . . . . . . . . . 8
9.3
Control registers . . . . . . . . . . . . . . . . . . . . . . . . 9
9.3.1
Register Control_1 . . . . . . . . . . . . . . . . . . . . . . 9
9.3.2
Register Control_2 . . . . . . . . . . . . . . . . . . . . . 10
9.4
OS flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
9.5
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.6
Time and date function . . . . . . . . . . . . . . . . . . 13
9.6.1
Register Seconds . . . . . . . . . . . . . . . . . . . . . . 13
9.6.2
Register Minutes. . . . . . . . . . . . . . . . . . . . . . . 13
9.6.3
Register Hours . . . . . . . . . . . . . . . . . . . . . . . . 13
9.6.4
Register Days . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.6.5
Register Weekdays. . . . . . . . . . . . . . . . . . . . . 14
9.6.6
Register Months . . . . . . . . . . . . . . . . . . . . . . . 14
9.6.7
Register Years . . . . . . . . . . . . . . . . . . . . . . . . 15
9.6.8
Setting and reading the time. . . . . . . . . . . . . . 15
9.7
Alarm function. . . . . . . . . . . . . . . . . . . . . . . . . 16
9.7.1
Register Minute_alarm . . . . . . . . . . . . . . . . . . 16
9.7.2
Register Hour_alarm . . . . . . . . . . . . . . . . . . . 17
9.7.3
Register Day_alarm . . . . . . . . . . . . . . . . . . . . 17
9.7.4
Register Weekday_alarm . . . . . . . . . . . . . . . . 17
9.7.5
Alarm flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9.8
Timer functions . . . . . . . . . . . . . . . . . . . . . . . . 19
9.8.1
Register Timer_clkout. . . . . . . . . . . . . . . . . . . 19
9.8.2
Register Countdown_timer . . . . . . . . . . . . . . . 20
9.8.3
Minute and second interrupt . . . . . . . . . . . . . . 20
9.8.4
Countdown timer function . . . . . . . . . . . . . . . . 21
9.8.5
Timer flags . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.9
Interrupt output . . . . . . . . . . . . . . . . . . . . . . . . 24
9.9.1
Minute and second interrupts . . . . . . . . . . . . . 24
9.9.2
Countdown timer interrupts. . . . . . . . . . . . . . . 25
9.9.3
Alarm interrupts . . . . . . . . . . . . . . . . . . . . . . . 26
9.9.3.1
Correction pulse interrupts . . . . . . . . . . . . . . . 26
9.10
Clock output . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.10.1
CLKOE pin . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.11
Offset register. . . . . . . . . . . . . . . . . . . . . . . . . 27
9.12
External clock test mode . . . . . . . . . . . . . . . . 30
9.13
STOP bit function . . . . . . . . . . . . . . . . . . . . . . 31
9.14
3-line serial interface . . . . . . . . . . . . . . . . . . . 32
9.14.1
Interface watchdog timer . . . . . . . . . . . . . . . . 34
10
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 36
11
Static characteristics . . . . . . . . . . . . . . . . . . . 37
12
Dynamic characteristics . . . . . . . . . . . . . . . . . 39
13
Application information . . . . . . . . . . . . . . . . . 41
14
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 42
15
Bare die outline . . . . . . . . . . . . . . . . . . . . . . . . 44
16
Handling information . . . . . . . . . . . . . . . . . . . 47
17
Packing information . . . . . . . . . . . . . . . . . . . . 48
18
Soldering of SMD packages . . . . . . . . . . . . . . 49
18.1
Introduction to soldering. . . . . . . . . . . . . . . . . 49
18.2
Wave and reflow soldering . . . . . . . . . . . . . . . 49
18.3
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 49
18.4
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 50
19
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 51
20
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
21
Revision history . . . . . . . . . . . . . . . . . . . . . . . 53
22
Legal information . . . . . . . . . . . . . . . . . . . . . . 54
22.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 54
22.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
22.3
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 54
22.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 54
23
Contact information . . . . . . . . . . . . . . . . . . . . 54
24
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55



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