SLLU326A May   2022  – June 2022 TLIN1431-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Features
    2. 1.2 Description
  4. 2EVM Setup and Features
    1. 2.1  Startup Mode Configurations
      1. 2.1.1 Pin and SPI Modes
      2. 2.1.2 Wake Request (WKRQ) vs. Inhibit Output (INH)
    2. 2.2  Commander and Responder Configurations
    3. 2.3  Local Wake-Up
    4. 2.4  Channel Expansion
    5. 2.5  VBAT Voltage Divider
    6. 2.6  Reset Input
    7. 2.7  Logic-Level LIMP and WAKE Signals
    8. 2.8  High-Voltage Signal Monitoring
    9. 2.9  TXD and RXD
    10. 2.10 VCC Load Testing
    11. 2.11 SPI Interface
  5. 3Jumpers, Headers, Connectors, Test Points, and Switches
  6. 4Bill of Materials
  7. 5Schematic

2.3 Local Wake-Up

The WAKE pin of the TLIN1431-Q1 is used for the local wake-up (LWU) function of the device, which is explained in detail in the data sheet. This can be directly interfaced close to the device using J15, pin “WAKE” without a shunt. Applying a shunt to J15 applies a pull-up and allows the use of the WAKE switch on the board.

J14 allows the user to select the pull-up source for this circuitry. Connect a shunt between pins “WAKE_PU” and “VBAT” to apply a pull-up to the battery voltage rail. In this configuration, the user can implement push-button wake using the WAKE switch S1.

Connecting a shunt between pins “WAKE_PU” and “HSS” of J14 provides a pull-up to the high-side switch of the device. This configuration is required if the user intends to implement cyclic-sense wake functionality. This functionality is described in detail in the device’s data sheet.