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AT21CSMK100 Atmel Single-Wire Serial EEPROM USB Evaluation Kit User Guide
Atmel-8993-SEEPROM-AT21CSMK100-UserGuide
21
7 Troubleshooting Guide
Issue:
The ATMembase no longer has the USB Bootloader Installed
Resolution:
In order to reprogram the USB bootloader, the user needs an Atmel JTAG ICEIII and the latest
version of Atmel Studio installed. Plug in the JTAG ICEIII and power the ATMembase using
another USB port. Plug the JTAG ICEIII cable into the JTAG header found on the ATMembase
referring to
Figure 32. ATMembase and JTAG ICEIII Connector
In Atmel Studio, navigate to Device Programming under Tools. Select the JTAG ICEIII as your
tool and AT90USB1287 as your Device, click Apply. Navigate to Memories and browse for the
bootloader under Flash (128Kb). Navigate to:
C:\Program Files (x86)\Atmel\Atmel Seeprom\2Wire\bootloader\
Select the at90usb128-bl-usb-1_0_1.hex file, and press the Program Button. Navigate to Fuses
and set the fuses according to the Fuse Values seen in
. Program the ATMembase.
Figure 33. ATMembase Fuse Settings
Once the Fuse Values are programmed, please close Device Programming and Exit Atmel
Studio. Open FLIP and follow the instructions outlined in the Application Note found on
Atmel.com at:
http://www.atmel.com/Images/Atmel-8991-SEEPROM-Upgrade-Kit-FW-Using-FLIP-
The use of external USB hubs can induce inconsistent programming behavior of the
ATMembase. Therefore, it is recommended to connect the ATMembase to a USB
port that is directly connected to the user’s computer during Flip DFU programming.