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PCF2123TS датащи(PDF) 63 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) 63 Page - NXP Semiconductors

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NXP Semiconductors
PCF2123
SPI Real time clock/calendar
© NXP B.V. 2011.
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: 27 April 2011
Document identifier: PCF2123
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
26. Contents
1
General description . . . . . . . . . . . . . . . . . . . . . . 1
2
Features and benefits . . . . . . . . . . . . . . . . . . . . 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
Functional description . . . . . . . . . . . . . . . . . . . 6
8.1
Low power operation . . . . . . . . . . . . . . . . . . . . 6
8.1.1
Power consumption with respect to
quartz series resistance . . . . . . . . . . . . . . . . . . 6
8.1.2
Power consumptions with respect to
timer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8.2
Register overview . . . . . . . . . . . . . . . . . . . . . . . 8
8.3
Control registers . . . . . . . . . . . . . . . . . . . . . . . . 9
8.3.1
Register Control_1 . . . . . . . . . . . . . . . . . . . . . . 9
8.3.1.1
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.3.2
Register Control_2 . . . . . . . . . . . . . . . . . . . . . 11
8.4
Time and date function . . . . . . . . . . . . . . . . . . 12
8.4.1
Register Seconds . . . . . . . . . . . . . . . . . . . . . . 12
8.4.1.1
OS flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.4.2
Register Minutes. . . . . . . . . . . . . . . . . . . . . . . 13
8.4.3
Register Hours . . . . . . . . . . . . . . . . . . . . . . . . 13
8.4.4
Register Days . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.4.5
Register Weekdays. . . . . . . . . . . . . . . . . . . . . 14
8.4.6
Register Months . . . . . . . . . . . . . . . . . . . . . . . 14
8.4.7
Register Years . . . . . . . . . . . . . . . . . . . . . . . . 15
8.4.8
Setting and reading the time. . . . . . . . . . . . . . 15
8.5
Alarm function. . . . . . . . . . . . . . . . . . . . . . . . . 17
8.5.1
Register Minute_alarm . . . . . . . . . . . . . . . . . . 17
8.5.2
Register Hour_alarm . . . . . . . . . . . . . . . . . . . 17
8.5.3
Register Day_alarm . . . . . . . . . . . . . . . . . . . . 17
8.5.4
Register Weekday_alarm . . . . . . . . . . . . . . . . 18
8.5.5
Alarm flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.6
Timer functions . . . . . . . . . . . . . . . . . . . . . . . . 20
8.6.1
Register Timer_clkout. . . . . . . . . . . . . . . . . . . 20
8.6.2
Register Countdown_timer . . . . . . . . . . . . . . . 20
8.6.3
Minute and second interrupt . . . . . . . . . . . . . . 20
8.6.4
Countdown timer function . . . . . . . . . . . . . . . . 22
8.6.5
Timer flags . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.7
Interrupt output . . . . . . . . . . . . . . . . . . . . . . . . 25
8.7.1
Minute and second interrupts . . . . . . . . . . . . . 26
8.7.2
Countdown timer interrupts. . . . . . . . . . . . . . . 26
8.7.3
Alarm interrupts . . . . . . . . . . . . . . . . . . . . . . . 27
8.7.3.1
Correction pulse interrupts . . . . . . . . . . . . . . . 27
8.8
Clock output . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.8.1
CLKOE pin . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.9
Offset register . . . . . . . . . . . . . . . . . . . . . . . . 29
8.10
External clock test mode . . . . . . . . . . . . . . . . 32
8.11
STOP bit function . . . . . . . . . . . . . . . . . . . . . . 33
9
3-line serial interface . . . . . . . . . . . . . . . . . . . 35
9.1
Interface watchdog timer . . . . . . . . . . . . . . . . 37
10
Internal circuitry . . . . . . . . . . . . . . . . . . . . . . . 38
11
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 39
12
Static characteristics . . . . . . . . . . . . . . . . . . . 40
13
Dynamic characteristics. . . . . . . . . . . . . . . . . 42
14
Application information . . . . . . . . . . . . . . . . . 44
15
Package outline. . . . . . . . . . . . . . . . . . . . . . . . 45
16
Bare die outline . . . . . . . . . . . . . . . . . . . . . . . . 48
17
Handling information . . . . . . . . . . . . . . . . . . . 52
18
Packing information . . . . . . . . . . . . . . . . . . . . 52
19
Soldering of SMD packages . . . . . . . . . . . . . . 54
19.1
Introduction to soldering. . . . . . . . . . . . . . . . . 54
19.2
Wave and reflow soldering. . . . . . . . . . . . . . . 54
19.3
Wave soldering . . . . . . . . . . . . . . . . . . . . . . . 54
19.4
Reflow soldering . . . . . . . . . . . . . . . . . . . . . . 55
20
Footprint information for reflow soldering . . 57
21
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 59
22
References. . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
23
Revision history . . . . . . . . . . . . . . . . . . . . . . . 60
24
Legal information . . . . . . . . . . . . . . . . . . . . . . 61
24.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 61
24.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
24.3
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 61
24.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 62
25
Contact information . . . . . . . . . . . . . . . . . . . . 62
26
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63



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