Known issues

From Low cost, low power, android ARM system board by Mini-Box.com - pico WiKi
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==USB==
 
==USB==
 
* Some USB devices (notably devices based on RealTek 8192CU) have issues when picoSAM9G45 is cold-booted with the USB dongle inserted in the USB slot.<br>
 
* Some USB devices (notably devices based on RealTek 8192CU) have issues when picoSAM9G45 is cold-booted with the USB dongle inserted in the USB slot.<br>
''Workaround'' - the C74 value must be increased from 0.1uF to 1uF by replacing the capacitor resulting a higher hardware reset time.
+
''Workaround'' - the C74 value must be increased from 0.1uF to 1uF by replacing the capacitor resulting a longer USB hub reset timer.

Revision as of 08:47, 1 December 2011

Known issues

changes and fixes are scheduled on the next hardware revision (April 2012)

miniPCIe

5Vaux-47-49-51-pins.jpg

Workaround - In order to eliminate the 5Vaux on pins 47, 49, 51 from the miniPCIe slot, follow this steps:

- cut the PCB trace marked with the two red lines as in the picture below.
Interrupt-PCB.jpg

- a thin wire must be soldered on the upper pin from R41 and on pin 3 from J7 on the backside of pico-SAM9G45 board, see the picture below
Wire-soldered-PCB.jpg

- after these modifications 5Vaux is eliminated from the miniPCIe.

Workaround - Pin 20 from the miniPCIe - W_Disable# is not accessible for cutting. Though, you can raise and remove the connector pin from the PCB using a needle and a soldering iron.

USB

Workaround - the C74 value must be increased from 0.1uF to 1uF by replacing the capacitor resulting a longer USB hub reset timer.

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