sw/host/opentitantool/config/opentitan.json

{
  "strappings": [
    {
      "name": "None",
      "pins": [
        {
          "name": "BOOTSTRAP",
          "level": false
        }
      ]
    },
    {
      "name": "RomBootstrap",
      "pins": [
        {
          "name": "BOOTSTRAP",
          "level": true
        }
      ]
    }
  ],
  "uarts": [
    {
      "name": "console",
      "baudrate": 115200,
      "parity": "None",
      "stopbits": "Stop1"
    }
  ]
}