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

1 Startup

The operational control mode of the TLIN1431-Q1 is determined during startup based on the configuration of pin 7 of the device, the PIN/nCS pin. Once the device starts up into either pin control or SPI control, it cannot switch to the other control mode without a power-on reset. Thus, start-up is the most important consideration in determining how the TLIN1431-Q1 behaves.

When the PIN/nCS pin is pulled to GND as shown in Figure 1-1, the device starts up in pin control. See Section 2 for configuration in pin control.

Figure 1-1 PIN/nCS Configuration for Pin Control

When left floating or when pulled to VCC as shown in Figure 1-2, the device operates in SPI control. See Section 3 for a configuration in SPI control, and see Section 1.1 regarding operational voltage selection for the TLIN14315-Q1 (5 V version of the device), which operates without the need for a VIO pin to determine logic-level voltages.

Figure 1-2 PIN/nCS Configurations for SPI Control