SNIS238 July   2025 TMP9R01-SEP

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Information
  6. 5 Pin Configuration and Functions
  7. 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 Two-Wire Timing Requirements
    7. 6.7 Quality Conformance Inspection
    8. 6.8 Timing Diagrams
    9. 6.9 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Temperature Measurement Data
      2. 7.3.2 Decoding Temperature Data
      3. 7.3.3 Series Resistance Cancellation
      4. 7.3.4 Differential Input Capacitance
      5. 7.3.5 Filtering
      6. 7.3.6 Sensor Fault
      7. 7.3.7 ALERT and THERM Functions
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode (SD)
    5. 7.5 Programming
      1. 7.5.1 Serial Interface
        1. 7.5.1.1 Bus Overview
        2. 7.5.1.2 Bus Definitions
        3. 7.5.1.3 Serial Bus Address
        4. 7.5.1.4 Read and Write Operations
        5. 7.5.1.5 Timeout Function
        6. 7.5.1.6 High-Speed Mode
      2. 7.5.2 General-Call Reset
  9. 8 Register Map
    1. 8.1 Register Information
      1. 8.1.1  Pointer Register
      2. 8.1.2  Local and Remote Temperature Registers
      3. 8.1.3  Status Register
      4. 8.1.4  Configuration Register
      5. 8.1.5  Conversion Rate Register
      6. 8.1.6  One-Shot Start Register
      7. 8.1.7  Channel Enable Register
      8. 8.1.8  Consecutive ALERT Register
      9. 8.1.9  η-Factor Correction Register
      10. 8.1.10 Remote Temperature Offset Register
      11. 8.1.11 Manufacturer Identification Register
  10. 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
    3. 9.3 Radiation Environments
      1. 9.3.1 Single Event Latch-Up
      2. 9.3.2 Single Event Functional Interrupt
      3. 9.3.3 Single Event Upset
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Related Documentation
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

8.1.4 Configuration Register

The configuration register sets the temperature range, the ALERT/ THERM modes, and controls the shutdown mode. The configuration register is set by writing to pointer address 09h, and is read by reading from pointer address 03h. Table 8-3 summarizes the bits of the configuration register.

Table 8-3 Configuration Register Bit Descriptions
CONFIGURATION REGISTER (Read = 03h, Write = 09h, POR = 00h)
BIT NUMBERNAMEFUNCTIONPOWER-ON RESET VALUE
7MASK10 = ALERT enabled
1 = ALERT masked		0
6SD0 = Run
1 = Shut down		0
5ALERT/ THERM20 = ALERT
1 = THERM2		0
4:3Reserved—0
2RANGE0 = –40°C to +127°C
1 = –64°C to +191°C		0
1:0Reserved—0

MASK1 (bit 7) of the configuration register masks the ALERT output. If MASK1 is 0 (default), the ALERT output is enabled. If MASK1 is set to 1, the ALERT output is disabled. This configuration applies only if the value of ALERT/ THERM2 (bit 5) is 0 (that is, pin 10 is configured as the ALERT output). If pin 10 is configured as the THERM2 output, the value of the MASK1 bit has no effect.

The shutdown bit (SD, bit 6) enables or disables the temperature-measurement circuitry. If SD = 0 (default), the TMP9R01-SEP device converts continuously at the rate set in the conversion rate register. When SD is set to 1, the TMP9R01-SEP device stops converting when the current conversion sequence is complete and enters a shutdown mode. When SD is set to 0 again, the TMP9R01-SEP resumes continuous conversions. When SD = 1, a single conversion can be started by writing to the one-shot start register; see the One-Shot Start Register section for more information.

ALERT/ THERM2 (bit 5) sets the configuration of pin 10. If the ALERT/ THERM2 bit is 0 (default), then pin 10 is configured as the ALERT output; if this bit is set to 1, then pin 10 is configured as the THERM2 output.

The temperature range is set by configuring RANGE (bit 2) of the configuration register. Setting this bit low (default) configures the TMP9R01-SEP device for the standard measurement range (–40°C to +127°C); temperature conversions are stored in the standard binary format. Setting bit 2 high configures the TMP9R01-SEP device for the extended measurement range (–64°C to +191°C); temperature conversions are stored in the extended binary format (see Table 7-1). The remaining bits of the configuration register are reserved and must always be set to 0. The power-on reset value for this register is 00h.