platform-teensy-gcc10/boards/teensylc.json

{
  "build": {
    "arduino": {
      "ldscript": "mkl26z64.ld"
    },
    "core": "teensy3",
    "cpu": "cortex-m0plus",
    "extra_flags": "-D__MKL26Z64__ -DARDUINO_TEENSYLC",
    "f_cpu": "48000000L",
    "mcu": "mkl26z64"
  },
  "debug": {
    "jlink_device": "MKL26Z64xxx4",
    "svd_path": "MKL26Z4.svd"
  },
  "frameworks": [
    "arduino"
  ],
  "name": "Teensy LC",
  "upload": {
    "maximum_ram_size": 8192,
    "maximum_size": 63488,
    "protocol": "teensy-gui",
    "protocols": [
      "teensy-cli",
      "teensy-gui",
      "jlink"
    ]
  },
  "url": "http://www.pjrc.com/teensy/teensyLC.html",
  "vendor": "Teensy"
}