ZHCSJK4G June   2009  – March 2021 PCA9548A

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Interface Timing Requirements
    7. 6.7 Reset Timing Requirements
    8. 6.8 Switching Characteristics
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
      1. 8.4.1 RESET Input
        1. 8.4.1.1 RESET Errata
          1. 8.4.1.1.1 System Impact
          2. 8.4.1.1.2 System Workaround
      2. 8.4.2 Power-On Reset
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
    6. 8.6 Register Maps
      1. 8.6.1 Device Address
      2. 8.6.2 Control Register
      3. 8.6.3 Bus Transactions
        1. 8.6.3.1 Writes
        2. 8.6.3.2 Reads
  9. 9 Application Information Disclaimer
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power-On Reset Requirements
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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8.6.1 Device Address

Figure 8-4 shows the address byte of the PCA9548A.

GUID-CF484A28-D072-4648-942F-AD3AAB358AF4-low.gifFigure 8-4 PCA9548A Address

The last bit of the slave address defines the operation (read or write) to be performed. When it is high (1), a read is selected, while a low (0) selects a write operation.

Table 8-1 shows the PCA9548A address reference.

Table 8-1 Address Reference
INPUTSI2C BUS SLAVE ADDRESS
A2A1A0
LLL112 (decimal), 70 (hexadecimal)
LLH113 (decimal), 71 (hexadecimal)
LHL114 (decimal), 72 (hexadecimal)
LHH115 (decimal), 73 (hexadecimal)
HLL116 (decimal), 74 (hexadecimal)
HLH117 (decimal), 75 (hexadecimal)
HHL118 (decimal), 76 (hexadecimal)
HHH119 (decimal), 77 (hexadecimal)
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