SNAS678C May   2018  – July 2021 HDC2080

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Timing Diagram
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Sleep Mode Power Consumption
      2. 8.3.2 Measurement Modes: Trigger on Demand vs. Auto Measurement
      3. 8.3.3 Heater
      4. 8.3.4 Interrupt Description
        1. 8.3.4.1 DRDY
      5. 8.3.5 INTERRUPT on Threshold
        1. 8.3.5.1 Temperature High
        2. 8.3.5.2 Temperature Low
        3. 8.3.5.3 Humidity High
        4. 8.3.5.4 Humidity Low
    4. 8.4 Device Functional Modes
      1. 8.4.1 Sleep Mode vs. Measurement Mode
    5. 8.5 Programming
      1. 8.5.1 I2C Serial Bus Address Configuration
      2. 8.5.2 I2C Interface
      3. 8.5.3 Serial Bus Address
      4. 8.5.4 Read and Write Operations
    6. 8.6 Register Maps
      1. 8.6.1  Address 0x00 Temperature LSB
      2. 8.6.2  Address 0x01 Temperature MSB
      3. 8.6.3  Address 0x02 Humidity LSB
      4. 8.6.4  Address 0x03 Humidity MSB
      5. 8.6.5  Address 0x04 Interrupt DRDY
      6. 8.6.6  Address 0x05 Temperature MAX
      7. 8.6.7  Address 0x06 Humidity MAX
      8. 8.6.8  Address 0x07 Interrupt Configuration
      9. 8.6.9  Address 0x08 Temperature Offset Adjustment
      10. 8.6.10 Address 0x09 Humidity Offset Adjustment
      11. 8.6.11 Address 0x0A Temperature Threshold LOW
      12. 8.6.12 Address 0x0B Temperature Threshold HIGH
      13. 8.6.13 Address 0x0C Humidity Threshold LOW
      14. 8.6.14 Address 0x0D Humidity Threshold HIGH
      15. 8.6.15 Address 0x0E Reset and DRDY/INT Configuration Register
      16. 8.6.16 Address 0x0F Measurement Configuration
      17. 8.6.17 Manufacturer ID Low
      18. 8.6.18 Manufacturer ID High
      19. 8.6.19 Device ID Low
      20. 8.6.20 Device ID High
  9. 9  Application and Implementation
    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 Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Guidelines for HDC2080 Storage and PCB Assembly
        1. 11.1.1.1 Storage and Handling
        2. 11.1.1.2 Soldering Reflow
        3. 11.1.1.3 Rework
        4. 11.1.1.4 High Temperature and Humidity Exposure
        5. 11.1.1.5 Bake/Re-Hydration Procedure
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.5.4 Read and Write Operations

Address registers, which hold data pertaining to the status of the device, can be accessed through a pointer mechanism and can be accessed and modified with the following write and read procedures. The register address value is the first byte transferred after the device slave address byte with the R/W bit low. Every write operation to the HDC2080 requires a value for the register address (refer to Table 8-2).

When reading from the HDC2080, the current pointer location is used to determine which register is read by a read operation -- the pointer location points to the last written register address. To change the address for a read operation, a new value must be written to the pointer. This transaction is accomplished by issuing the slave address byte with the R/W bit set to '0', followed by the pointer byte. No additional data is required (refer to Table 8-4).

The master can then generate a START condition and send the slave address byte with the R/W bit set to 1 to initiate the read command. The address register is incremented automatically to enable the multibyte read and write operation (refer to Table 8-3 and Table 8-5). Note that register bytes are sent MSB first, followed by the LSB. A write operation in a read-only register such as DEVICE ID, MANUFACTURER ID, or SERIAL ID returns a NACK after each data byte. A read or write operation to an unused address returns a NACK after the pointer, and a read or write operation with incorrect I2C address returns a NACK after the I2C address.

Table 8-2 Write Single Byte
MasterSTARTSlave address (W)AddressDATASTOP
SlaveACKACKACK
Table 8-3 Write Multi Byte
MasterSTARTSlave address (W)AddressDATADATA………STOP
SlaveACKACKACKACK
Table 8-4 Read Single Byte
MasterSTARTSlave address (W)AddressStartSlave address (R)NACKSTOP
SlaveACKACKACKDATA
Table 8-5 Read Multi Byte
MasterSTARTSlave address (W)AddressStartSlave address (R)ACKACK……NACKSTOP
SlaveACKACKACKDATADATA