{ "build": { "arduino": { "ldscript": "mk20dx256.ld" }, "core": "teensy3", "cpu": "cortex-m4", "extra_flags": "-D__MK20DX256__ -DARDUINO_TEENSY31", "f_cpu": "72000000L", "mcu": "mk20dx256" }, "debug": { "jlink_device": "MK20DX256xxx10", "svd_path": "MK20D5.svd" }, "frameworks": [ "arduino", "mbed" ], "name": "Teensy 3.1 / 3.2", "upload": { "maximum_ram_size": 65536, "maximum_size": 262144, "protocol": "teensy-gui", "protocols": [ "teensy-cli", "teensy-gui", "jlink" ] }, "url": "https://www.pjrc.com/store/teensy31.html", "vendor": "Teensy" }