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8.2 MCU FIRMWARE UPGRADE
miniDSP may occasionally provide an update to the DDRC-22D MCU firmware to enable new features. To update
the MCU firmware, first download and install the latest version of the DDRC-22 Utility program from the User
Downloads section of the miniDSP website. Then follow the instructions below for your platform.
DO NOT DISCONNECT THE USB CABLE OR POWER FROM THE DDRC-22D WHILE FIRMWARE UPDATE IS
IN PROGRESS. DOING SO MAY “BRICK” YOUR PROCESSOR.
8.2.1 Windows
1. Connect the processor to your computer via USB (if not already connected) and power it on.
2. Start the DDRC-22 utility program.
3. Click on the Connect button. The button will display a green tick if connection is successful.
4. Click on the Upgrade Firmware button. The DDRC-22D will be put into boot loader mode and the miniDSP
upgrade utility will start. The status line should display “Device attached”.
5. Click on the Open Hex File button and select the .hex file located in the firmware folder of the download. It
will have a name like ENC_DDRC22_Ver2.26_SS.hex.
6. Click on the Program/Verify button. The status bar will indicate progress. Do not disconnect the USB cable
or remove power from the processor while this runs!
7. After the status indicates that the verify has completed successfully, click on the Reset Device button, and
then quit the upgrade utility.
8. Return to the DDRC-22 Utility program. (If there is a dialog informing "Connection to DSP closed," click on
OK.) Click on the Connect button, and then on About to verify the new firmware version.
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