The interface MCU features a Mass Storage Device (MSD). This makes the
development kit appear as an external drive on your computer.
This drive can be used for drag-and-drop programming. Files cannot be stored on this drive. By
copying a HEX file to the drive, the interface MCU will program the file to the device.
Note:
- Windows might try to defragment the MSD part of the interface MCU. If this happens, the
interface MCU will disconnect and be unresponsive. To return to normal operation, the
development kit must be power cycled.
- Your antivirus software might try to scan the MSD part of the interface MCU. Some antivirus
programs trigger a false positive alert in one of the files and
quarantine the unit. If this happens, the interface MCU will become unresponsive.
- If the computer is set up to boot from USB, it can try to boot from the development kit if
the development kit is connected during boot. This could be avoided by unplugging the
development kit before a computer restart, or changing the boot sequence of the computer.
You can also disable the MSD of the kit by using the msddisable command in
J-Link Commander. To enable, use the msdenable command. These commands take
effect after a power cycle of the development kit and should stay this way until changed
again.