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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCA9541AD/03 датащи(PDF) 41 Page - NXP Semiconductors |
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PCA9541AD/03 датащи(HTML) 41 Page - NXP Semiconductors |
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41 / 41 page  NXP Semiconductors PCA9541A 2-to-1 I2C-bus master selector with interrupt logic and reset © 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 July 2009 Document identifier: PCA9541A_3 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. 21. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 Ordering information . . . . . . . . . . . . . . . . . . . . . 3 5 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 Pinning information . . . . . . . . . . . . . . . . . . . . . . 5 7.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 7.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 Functional description . . . . . . . . . . . . . . . . . . . 7 8.1 Device address . . . . . . . . . . . . . . . . . . . . . . . . . 7 8.2 Command Code . . . . . . . . . . . . . . . . . . . . . . . . 7 8.3 Interrupt Enable and Control registers description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 8.3.1 Register 0: Interrupt Enable (IE) register (B1:B0 = 00b) . . . . . . . . . . . . . . . . . . . . . . . . . 10 8.3.2 Register 1: Control Register (B1:B0 = 01b) . . 11 8.4 Interrupt Status registers . . . . . . . . . . . . . . . . 15 8.4.1 Bus control lost interrupt . . . . . . . . . . . . . . . . . 15 8.4.2 Recovery/initialization interrupt. . . . . . . . . . . . 15 8.4.3 Downstream interrupt . . . . . . . . . . . . . . . . . . . 16 8.4.4 Functional test interrupt . . . . . . . . . . . . . . . . . 16 8.4.5 Register 2: Interrupt Status Register (B1:B0 = 10b) . . . . . . . . . . . . . . . . . . . . . . . . . 16 8.5 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 17 8.6 External reset . . . . . . . . . . . . . . . . . . . . . . . . . 18 8.7 Voltage translation . . . . . . . . . . . . . . . . . . . . . 18 9 Characteristics of the I2C-bus. . . . . . . . . . . . . 19 9.1 Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 9.2 START and STOP conditions . . . . . . . . . . . . . 19 9.3 System configuration . . . . . . . . . . . . . . . . . . . 20 9.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 20 9.5 Bus transactions . . . . . . . . . . . . . . . . . . . . . . . 21 10 Application design-in information . . . . . . . . . 24 10.1 Specific applications . . . . . . . . . . . . . . . . . . . . 24 10.2 High reliability systems . . . . . . . . . . . . . . . . . . 25 10.3 Masters with shared resources. . . . . . . . . . . . 26 10.4 Gatekeeper multiplexer . . . . . . . . . . . . . . . . . . 26 10.5 Bus initialization/recovery to initialize slaves without hardware reset . . . . . . . . . . . . 27 11 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 28 12 Static characteristics. . . . . . . . . . . . . . . . . . . . 28 13 Dynamic characteristics . . . . . . . . . . . . . . . . . 30 14 Test information . . . . . . . . . . . . . . . . . . . . . . . . 32 15 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 33 16 Soldering of SMD packages . . . . . . . . . . . . . . 36 16.1 Introduction to soldering. . . . . . . . . . . . . . . . . 36 16.2 Wave and reflow soldering . . . . . . . . . . . . . . . 36 16.3 Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 36 16.4 Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 37 17 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 38 18 Revision history . . . . . . . . . . . . . . . . . . . . . . . 39 19 Legal information . . . . . . . . . . . . . . . . . . . . . . 40 19.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 40 19.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 19.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 40 19.4 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 40 20 Contact information . . . . . . . . . . . . . . . . . . . . 40 21 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 |
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