SBOS397I August   2007  – June 2024 TMP102

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Digital Temperature Output
      2. 6.3.2  Serial Interface
      3. 6.3.3  Bus Overview
      4. 6.3.4  Serial Bus Address
      5. 6.3.5  Writing and Reading Operation
      6. 6.3.6  Target Mode Operations
        1. 6.3.6.1 Target Receiver Mode
        2. 6.3.6.2 Target Transmitter Mode
      7. 6.3.7  SMBus Alert Function
      8. 6.3.8  General Call
      9. 6.3.9  High-Speed (HS) Mode
      10. 6.3.10 Timeout Function
      11. 6.3.11 Timing Diagrams
    4. 6.4 Device Functional Modes
      1. 6.4.1 Continuous-Conversion Mode
      2. 6.4.2 Extended Mode (EM)
      3. 6.4.3 Shutdown Mode (SD)
      4. 6.4.4 One-Shot/Conversion Ready (OS)
      5. 6.4.5 Thermostat Mode (TM)
        1. 6.4.5.1 Comparator Mode (TM = 0)
        2. 6.4.5.2 Interrupt Mode (TM = 1)
    5. 6.5 Programming
      1. 6.5.1 Pointer Register
      2. 6.5.2 Temperature Register
      3. 6.5.3 Configuration Register
        1. 6.5.3.1 Shutdown Mode (SD)
        2. 6.5.3.2 Thermostat Mode (TM)
        3. 6.5.3.3 Polarity (POL)
        4. 6.5.3.4 Fault Queue (F1/F0)
        5. 6.5.3.5 Converter Resolution (R1/R0)
        6. 6.5.3.6 One-Shot (OS)
        7. 6.5.3.7 EM Bit
        8. 6.5.3.8 Alert (AL Bit)
        9. 6.5.3.9 Conversion Rate (CR)
      4. 6.5.4 High- and Low-Limit Registers
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.3.5 Writing and Reading Operation

Accessing a particular register on the TMP102 device is accomplished by writing the appropriate value to the pointer register. The value for the pointer register is the first byte transferred after the target address byte with the R/W bit low. Every write operation to the TMP102 device requires a value for the pointer register (see Figure 6-2).

When reading from the TMP102 device, the last value stored in the pointer register by a write operation determines which register is read by a read operation. To change the register pointer for a read operation, a new value must be written to the pointer register. This action is accomplished by issuing a target address byte with the R/W bit low, followed by the pointer register byte. No additional data are required. The controller then generates a START condition and sends the target address byte with the R/W bit high to initiate the read command. See Figure 6-1 for details of this sequence. If repeated reads from the same register are desired, continually sending the Pointer Register bytes is not necessary because the TMP102 remembers the Pointer Register value until the device is changed by the next write operation.

Register bytes are sent with the most significant byte first, followed by the least significant byte.