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Jazz USB communication problems

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Hi everyone,

I'm having problems communicating with Jazz units via USB.

I've installed the STMicroelectronics driver, the virtual COM port is shown in the device drivers.

And I can actually communicate with the unit initially, but at some point the software can not detect the Jazz anymore.

I've rebooted the Jazz, rebooted my PC, re-installed the driver, and just can't link to the Jazz via USB anymore.

I actually tried with a different Jazz unit with the same results.


The serial communication via the JZ-PRG works fine (not at the same time I use the USB off course).


The versions I have are:

U90 6.6.0 (DB 109)

JZ20-R16 (latest firmware)

Windows 7, 64


I'll appreciate your suggestions.

Thank You!


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