SPRUJG7 May   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
      1. 1.1.1 Important Usage Notes
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 System Components
      1. 2.1.1 System Components Top
      2. 2.1.2 System Components Bottom
    2. 2.2 Power Requirements
    3. 2.3 Setup
    4. 2.4 Header Information
      1. 2.4.1 Connector Pinout
      2. 2.4.2 Debug Connector Pinouts
    5. 2.5 Interfaces
    6. 2.6 Switch Information
    7. 2.7 Indicator LED
    8. 2.8 Test Points
  7. 3Software
  8. 4Hardware Design Files
  9. 5References
  10. 6Trademarks
  11. 7Revision History

2.6 Switch Information

There are multiple manual switches on this design to allow for static option selection.

Reset Select Switch

The reset select switch (SW1) is used to select the TAS67CD-AEC reset source from the AEC interface. This is a single pole, double throw (SPDT) switch that selects between the AEC PORZ and RESETSTATZ signals. This switch is set depending on the supported reset signal provided by the attached audio baseboard EVM.

In the orientation shown, and as shown in PCB silkscreen, the lower switch position can be selected for use with the AUDIO-AM62D-EVM using the PORZ output. Likewise, the upper position is used to select the

TAS67CD-AEC Reset Select Switch Diagram Figure 2-7 Reset Select Switch Diagram

TAS67x GPIO Select Switches

The reset select switches (SW4 and SW2) are used to toggle the TAS67x GPIO0 input high or low. This GPIO0 is a software configurable input option which can be used to select a few different modes of operation, including the MUTE mode. This is a single pole, single throw (SPST) switch that selects between the IOVDD and GND being applied to the TAS67x GPIO0 pin. By default, the switch state is ignored by the TAS67x until the GPIO0 programmable input is programmed by I2C register writes.

See the TAS6754-Q1 data sheet for more information on using the GPIO0 input.

In the orientation shown, and as described in PCB silkscreen, the left switch position sets the GPIO0 input to GND. Likewise the right switch position sets the GPIO0 to IOVDD.

With no external pulls on GPIO0 and GPIO1, STBY uses internal pull down to hold the state of these signals. TAS0 and TAS1 can not play audio until GPIO0 and GPIO1 are written high.

TAS67CD-AEC TAS0 and TAS1 GPIO0 Select Switch PCB Detail Excerpt Figure 2-8 TAS0 and TAS1 GPIO0 Select Switch PCB Detail Excerpt