LD_FILE = boards/samd51x19-bootloader-external-flash.ld USB_VID = 0x239A USB_PID = 0x802C USB_PRODUCT = "ItsyBitsy M4 Express" USB_MANUFACTURER = "Adafruit Industries LLC" QSPI_FLASH_FILESYSTEM = 1 EXTERNAL_FLASH_DEVICE_COUNT = 1 EXTERNAL_FLASH_DEVICES = GD25Q16C LONGINT_IMPL = MPZ CHIP_VARIANT = SAMD51G19A CHIP_FAMILY = samd51