UniFlash Step Action Erasing IC

The Tools Team confirmed my assumption.  The “Erase Entire Flash” button results in DPActiveDebugSession.expression.evaluate("MassErase()") which is executed as such:

hotmenu MassErase()
{
    GEL_TextOut("Initializing.\n", "MassErase()");
    _isMassErase = 1;

    // Disconnect from target. This must be done for each module in the device debug sub-system hierarchy.
    DisconnectIfConnected(); // Cortex
    GEL_EvalOnTarget("<parent>", "DisconnectIfConnected()", 1); // DAP (Cortex' parent)
    GEL_EvalOnTarget("<parent>", "GEL_EvalOnTarget(\"<parent>\",\"DisconnectIfConnected()\", 1)", 1); // Icepick (DAP's parent)

    // Do board reset
    GEL_TextOut("Issuing Board Reset.\n", "MassErase()");
    GEL_AdvancedReset("Board Reset");

    // Reconnect to Icepick
    GEL_EvalOnTarget("<parent>", "GEL_EvalOnTarget(\"<parent>\",\"ConnectIfDisconnected()\", 1)", 1);

    // Issue mass erase from Icepick and disconnect
    GEL_EvalOnTarget("<parent>", "GEL_EvalOnTarget(\"<parent>\",\"IP_CC26xx_CHIPERASE = 1\", 1)", 1);
    GEL_EvalOnTarget("<parent>", "GEL_EvalOnTarget(\"<parent>\",\"DisconnectIfConnected()\", 1)", 1);

    // Workaround on engineering devices. Disconnect and reconnect for chip erase to take effect.
    ConnectIfDisconnected();
    DisconnectIfConnected();
    _isMassErase = 0;

    GEL_TextOut("Mass erase complete.\n", "MassErase()");
}

The IP_CC26xx_CHIPERASE register is a virtual register defined by the XDS driver, and writing 1 to it will result in the XDS probe setting CHIP_ERASE_REQ in the WUC TAP.

Regards,
Ryan