SBOS441I September   2009  – October 2019 TMP431 , TMP432

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application Schematics
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Temperature Measurement Data
      2. 8.3.2 Beta Compensation
      3. 8.3.3 Series Resistance Cancellation
      4. 8.3.4 Differential Input Capacitance
      5. 8.3.5 Filtering
      6. 8.3.6 Sensor Fault
      7. 8.3.7 THERM and ALERT/THERM2
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode (SD)
      2. 8.4.2 One-Shot Mode
    5. 8.5 Programming
      1. 8.5.1  Serial Interface
      2. 8.5.2  Bus Overview
      3. 8.5.3  Timing Diagrams
      4. 8.5.4  Serial Bus Address
      5. 8.5.5  Read and Write Operations
      6. 8.5.6  Undervoltage Lockout
      7. 8.5.7  Timeout Function
      8. 8.5.8  High-Speed Mode
      9. 8.5.9  General Call Reset
      10. 8.5.10 SMBus Alert Function
    6. 8.6 Register Maps
      1. 8.6.1  Pointer Register
      2. 8.6.2  Temperature Registers
      3. 8.6.3  Limit Registers
      4. 8.6.4  Status Registers
        1. 8.6.4.1 TMP431 Status Register
        2. 8.6.4.2 TMP432 Status Register
      5. 8.6.5  Configuration Register 1
      6. 8.6.6  Configuration Register 2
      7. 8.6.7  Conversion Rate Register
      8. 8.6.8  Beta Compensation Configuration Register
      9. 8.6.9  η-Factor Correction Register
      10. 8.6.10 Software Reset
      11. 8.6.11 Consecutive Alert Register
      12. 8.6.12 Therm Hysteresis Register
      13. 8.6.13 Identification Registers
      14. 8.6.14 Open Status Register
      15. 8.6.15 Channel Mask Register
      16. 8.6.16 High Limit Status Register
      17. 8.6.17 Low Limit Status Register
      18. 8.6.18 THERM Limit Status Register
  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
    2. 11.2 Layout Examples
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.6.4.2 TMP432 Status Register

Table 6. TMP432 Status Register Format

TMP432 STATUS REGISTER (Read = 02h, Write = NA)
BIT # D7 D6 D5 D4 D3 D2 D1 D0
BIT NAME BUSY 0 0 HIGH LOW OPEN THERM 0
POR VALUE 0(1) 0 0 0 0 0 0 0
(1) The BUSY bit changes to 1 almost immediately (<< 100 μs) following power-up, as the TMP432 begins the first temperature conversion. It is high whenever the TMP432 is converting a temperature reading.

The TMP432 has a Status Register to report the state of the temperature comparators. Table 6 lists the Status Register bits. The Status Register is read-only and is read by reading from pointer address 02h.

The BUSY bit reads as 1 if the ADC is making a conversion. It reads as 0 if the ADC is not converting.

The OPEN bit reads as 1 if the remote transistor was detected as open from the last read of the Status Register. The OPEN status is only detected when the ADC is attempting to convert a remote temperature.

The THERM bit reads as 1 if the temperature from any channel (remote or local) has exceeded the THERM limit and remains greater than the THERM limit less the value in the shared Hysteresis Register; see Figure 18.

The HIGH bit value depends on the state of the AL/TH bit in the Configuration Register 1. If the AL/TH bit is 0, the HIGH bit reads 1 if any of the temperature channels go beyond the programmed high limit from the last clearing of the Status Register. If the AL/TH bit is 1, the HIGH limit is used to implement THERM2 function. The HIGH bit reads as 1 if the temperature exceeds the high limit less the value in the Hysteresis Register.

The AL/TH bit does not affect the Status Register LOW bit. The LOW bit reads as 1 if any of the temperature channels go beyond the programmed low limit from the last clearing of the Status Register.

The values of the LOW and OPEN bits (as well as HIGH when AL/TH is 0) are latched and read as 1 until the corresponding Status Register is read or a device reset occurs. These bits are cleared by reading the Low Limit Status, High Limit Status, and Open Status registers if the condition causing the flag to be set no longer exists.

The values of BUSY and THERM (as well as HIGH when AL/TH is 1) are not latched and are not cleared by reading the Status Register. They always indicate the current state, and are updated appropriately at the end of the corresponding ADC conversion.

The TMP432 NORs HIGH, LOW, and OPEN, so a status change for any of these flags from 0 to 1 automatically causes the ALERT pin to go low (only applies when the ALERT/THERM2 pin is configured for ALERT mode).