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PCA8565 Datasheet(PDF) 39 Page - NXP Semiconductors

Part # PCA8565
Description  Real time clock/calendar
PDF  39 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA8565 Datasheet(HTML) 39 Page - NXP Semiconductors

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NXP Semiconductors
PCA8565
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: 16 June 2009
Document identifier: PCA8565_2
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
20. 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 . . . . . . . . . . . . . . . . . . . . . . . . . 4
8
Device protection diagram . . . . . . . . . . . . . . . . 5
9
Functional description . . . . . . . . . . . . . . . . . . . 5
9.1
Register overview . . . . . . . . . . . . . . . . . . . . . . . 6
9.2
Control registers . . . . . . . . . . . . . . . . . . . . . . . . 7
9.2.1
Register Control_1 . . . . . . . . . . . . . . . . . . . . . . 7
9.2.2
Register Control_2 . . . . . . . . . . . . . . . . . . . . . . 7
9.3
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
9.4
Time and date registers . . . . . . . . . . . . . . . . . . 8
9.5
Data flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.6
Alarm function. . . . . . . . . . . . . . . . . . . . . . . . . 12
9.6.1
Alarm registers . . . . . . . . . . . . . . . . . . . . . . . . 13
9.6.2
Alarm flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9.7
Timer functions . . . . . . . . . . . . . . . . . . . . . . . . 14
9.7.1
Register Timer_control . . . . . . . . . . . . . . . . . . 15
9.8
Interrupt output . . . . . . . . . . . . . . . . . . . . . . . . 15
9.8.1
Bits TF and AF . . . . . . . . . . . . . . . . . . . . . . . . 15
9.8.2
Bits TIE and AIE . . . . . . . . . . . . . . . . . . . . . . . 16
9.8.3
Countdown timer interrupts. . . . . . . . . . . . . . . 16
9.9
Clock output . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9.10
Voltage-low detector . . . . . . . . . . . . . . . . . . . . 17
9.11
External clock (EXT_CLK) test mode . . . . . . . 17
9.12
STOP bit function . . . . . . . . . . . . . . . . . . . . . . 18
9.13
Power-On Reset (POR) override . . . . . . . . . . 20
10
Characteristics of the I2C-bus. . . . . . . . . . . . . 21
10.1
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
10.2
START and STOP conditions . . . . . . . . . . . . . 21
10.3
System configuration . . . . . . . . . . . . . . . . . . . 21
10.4
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 22
10.5
I2C-bus protocol . . . . . . . . . . . . . . . . . . . . . . . 23
10.5.1
Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
10.5.2
Clock and calendar read/write cycles . . . . . . . 23
10.5.3
Interface watchdog timer. . . . . . . . . . . . . . . . . 24
11
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 26
12
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 27
12.1
Static characteristics. . . . . . . . . . . . . . . . . . . . 27
12.2
Dynamic characteristics . . . . . . . . . . . . . . . . . 29
13
Application information . . . . . . . . . . . . . . . . . 31
13.1
Quartz frequency adjustment . . . . . . . . . . . . . 31
13.1.1
Method 1: fixed OSCI capacitor . . . . . . . . . . . 31
13.1.2
Method 2: OSCI trimmer . . . . . . . . . . . . . . . . 31
13.1.3
Method 3: OSCO output. . . . . . . . . . . . . . . . . 31
14
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 32
15
Soldering of SMD packages . . . . . . . . . . . . . . 34
15.1
Introduction to soldering. . . . . . . . . . . . . . . . . 34
15.2
Wave and reflow soldering . . . . . . . . . . . . . . . 34
15.3
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 34
15.4
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 35
16
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 36
17
Revision history . . . . . . . . . . . . . . . . . . . . . . . 37
18
Legal information . . . . . . . . . . . . . . . . . . . . . . 38
18.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 38
18.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
18.3
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 38
18.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 38
19
Contact information . . . . . . . . . . . . . . . . . . . . 38
20
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39



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