Configuring Pad Voltage Setting

Pins and pads support multiple voltage levels at a given interface. They can operate at 1.2 volts (V), 1.8 V or 3.3 V. Based on the interface and power tree of a given platform, the software must write the correct voltage of these pads to enable the interface. If pad voltage is higher than the Input/Output power rail, the pin does NOT function on that level. If pad voltage is lower than Input/Output power rail, the SOC pads can be damaged. Consequently, it is required to configure the correct pad voltage based on the power tree.

The pad configuration file is available at:

<top>/drive-foundation/platform-config/t23x/automotive/bct/<board>/padvoltage/tegra194-mb1-bct-pad-<board>-<sku_id>-<rev>-t<a|b|c>.cfg

For example:

tegra194-mb1-padvoltage-e3550-0001-b01-ta.cfg

For definitions of the <board>-<sku_id>-<rev>-t<a|b|c>, see the Release Notes.