SLLA578 June   2022 TLIN1431-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1Startup
    1. 1.1 Operational Voltages
    2. 1.2 Power-Up and INIT Mode
  4. 2Pin Control
    1. 2.1 Typical Application
    2. 2.2 Power-Up into Normal Mode in Pin Control
      1. 2.2.1 Restart Mode from INIT Mode in Pin Control
      2. 2.2.2 Standby Mode from Restart Mode in Pin Control
      3. 2.2.3 Normal Mode in Pin Control
    3. 2.3 Power-Up into Fast Mode in Pin Control
    4. 2.4 Sleep Mode to Normal Mode in Pin Control
    5. 2.5 Fail-Safe Mode to Normal Mode in Pin Control
  5. 3SPI Control
    1. 3.1 Typical Application
    2. 3.2 Power-Up into Normal Mode in SPI Control
      1. 3.2.1 Restart Mode from INIT Mode in SPI Control
      2. 3.2.2 Standby Mode from Restart Mode in SPI Control
      3. 3.2.3 Normal Mode in SPI Control
    3. 3.3 Power-Up into Fast Mode in SPI Control
    4. 3.4 Sleep Mode to Normal Mode in SPI Control
    5. 3.5 Fail-Safe Mode to Normal Mode in SPI Control
    6. 3.6 Configuring Watchdog through SPI
  6. 4Pin Assignments in Pin Control vs. SPI Control
  7. 5References

Abstract

This application note provides an overview of the common bring-up cases of the TLIN1431-Q1 LIN SBC with integrated high-side switch and watchdog. This device can be operated using either of two control modes, determined upon device power-up: pin control or SPI control. In pin control, the device’s pins are configured such that the watchdog and state changes of the TLIN1431-Q1 are controlled using logic inputs to the pins. In this control mode, the device is not configurable through SPI. Conversely, in SPI control, the device’s pins are configured differently, four of which behave as CLK, SDO, SDI, and nCS, thereby allowing SPI programming for the device. The device operates with a different state diagram between the two control modes, including different triggers for state changes, different state conditions, and different programmability. This report will provide an overview of a general method of powering up the TLIN1431-Q1 into either of these two control modes.