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

3.2.3 Normal Mode in SPI Control

Figure 3-5 Normal Mode in SPI Control

Normal mode is the regular operating state of the TLIN1431-Q1, in which TXD is passed to LIN and LIN is passed to RXD at the LIN-specified maximum of 20 kbps.

From normal mode, the device can be transitioned to any of the following states through a SPI command, setting the LIN_MODE bits of the LIN_CNTRL register (8’h1D[7:6]) to any of the following values:

  • 00b = Standby mode
  • 01b = Sleep mode
  • 10b = Normal mode (current mode)
  • 11b = Fast mode

In addition, the device will transition to restart mode if a UVSUP, nRST, watchdog failure, or SOFT_RST event occurs. It will transition to fail-safe mode (if enabled) or sleep mode (if FSM disabled) if a UVCC, OVCC, thermal shutdown, or VCC short-circuit event occurs.