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

2.7 Logic-Level LIMP and WAKE Signals

This EVM implements on-board comparators to provide logic-level outputs representing the states of LIMP and WAKE respectively, which are high-voltage signals for the device. These are provided as “LIMP_MCU” and “WAKE_MCU” on J4, thus configuring all J4 signals as logic-level, and potentially capable of being connected to general-purpose inputs on an external micro controller.

Note that LIMP_MCU and WAKE_MCU are outputs, and are not connected to LIMP and WAKE. Thus, for example. a signal cannot be applied to WAKE_MCU that would impact the high-voltage WAKE signal on the TLIN1431-Q1.

It is also possible to reconfigure the WAKE_MCU output to reflect the state of HSS rather than WAKE. This can be accomplished by depopulating R17 and populating a 0 Ω resistor on R19. Take care to ensure that only one of these resistors is populated at a time.