SBOS581B September   2011  – June 2022 TMP100-Q1 , TMP101-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Digital Temperature Output
      2. 7.3.2  Serial Interface
      3. 7.3.3  Bus Overview
      4. 7.3.4  Serial Bus Address
      5. 7.3.5  Writing and Reading to the TMP100-Q1 and TMP101-Q1
      6. 7.3.6  Target Mode Operations
        1. 7.3.6.1 Target Receiver Mode
        2. 7.3.6.2 Target Transmitter Mode
      7. 7.3.7  SMBus Alert Function
      8. 7.3.8  General Call
      9. 7.3.9  High-Speed Mode
      10. 7.3.10 POR (Power-On Reset)
      11. 7.3.11 Timing Diagrams
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode (SD)
      2. 7.4.2 OS/ALERT (OS)
      3. 7.4.3 Thermostat Mode (TM)
      4. 7.4.4 Comparator Mode (TM = 0)
      5. 7.4.5 Interrupt Mode (TM = 1)
    5. 7.5 Programming
      1. 7.5.1 Pointer Register
        1. 7.5.1.1 Pointer Register Byte (pointer = N/A) [reset = 00h]
        2. 7.5.1.2 Pointer Addresses of the TMP100-Q1 and TMP101-Q1 Registers
      2. 7.5.2 Temperature Register
      3. 7.5.3 Configuration Register
        1. 7.5.3.1 Shutdown Mode (SD)
        2. 7.5.3.2 Thermostat Mode (TM)
        3. 7.5.3.3 Polarity (POL)
        4. 7.5.3.4 Fault Queue (F1, F0)
        5. 7.5.3.5 Converter Resolution (R1, R0)
        6. 7.5.3.6 OS/ALERT (OS)
      4. 7.5.4 High- and Low-Limit Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.3 Bus Overview

The device that initiates the transfer is called a controller, and the devices controlled by the controller are targets. The bus must be controlled by a controller device that generates the serial clock (SCL), controls the bus access, and generates the START and STOP conditions.

To address a specific device, a START condition is initiated, indicated by pulling the data line (SDA) from a HIGH to LOW logic level while SCL is HIGH. All targets on the bus shift in the target address byte, with the last bit indicating whether a read or write operation is intended. During the ninth clock pulse, the target being addressed responds to the controller by generating an Acknowledge and pulling SDA LOW.

Data transfer is then initiated and sent over eight clock pulses followed by an Acknowledge Bit. During data transfer, SDA must remain stable while SCL is HIGH because any change in SDA while SCL is HIGH is interpreted as a control signal.

When all data are transferred, the controller generates a STOP condition indicated by pulling SDA from LOW to HIGH, while SCL is HIGH.