platform-teensy-gcc10/boards/teensy40.json

{
  "build": {
    "arduino": {
      "ldscript": "imxrt1062.ld"
    },
    "core": "teensy4",
    "cpu": "cortex-m7",
    "extra_flags": "-D__IMXRT1062__ -DARDUINO_TEENSY40",
    "f_cpu": "600000000",
    "mcu": "imxrt1062"
  },
  "connectivity": [
    "can"
  ],
  "debug": {
    "jlink_device": "MIMXRT1062xxxxA"
  },
  "frameworks": [
    "arduino"
  ],
  "name": "Teensy 4.0",
  "upload": {
    "maximum_ram_size": 524288,
    "maximum_size": 2031616,
    "protocol": "teensy-gui",
    "protocols": [
      "teensy-gui",
      "jlink"
    ]
  },
  "url": "https://www.pjrc.com/store/teensy40.html",
  "vendor": "Teensy"
}