EV20F92A Serial Memory SPI Evaluation Kit User’s Guide
2022 Microchip Technology Inc. and its subsidiaries
DS20006685A-page 35
FIGURE 4-2:
USB BASE BOARD BUTTONS
Once the
HWB
and
RESET
buttons have been located, use the specific press and hold
sequence shown below to enable DFU mode on the USB Base Board:
• Press and hold the
HWB
button
• Press and release
the
RESET
button
• Release
the
HWB
button
Once the USB Base Board has DFU mode enabled, allow the PC to relearn the USB
Base Board as “AT90USB128 DFU” (
). If the PC does not automatically rec-
ognize the USB Base Board as stated above and shown below, it is recommended to
unplug the USB Base Board from the PC and restart the procedure.
FIGURE 4-3:
AT90USB128 DFU COM PORT
Note:
Once DFU mode is enabled on the USB Base Board, the rest of the
firmware update process must be completed in order to ensure robust USB
Base Board operation.
HWB button
RESET button
