Spartan-6 LX16 Evaluation Kit

[bhfletcher]

The S6LX16 Rev B board has an issue if you try to power up the board using the optional 12V supply without the battery or USB cable plugged in.  A work-around has been designed for this problem.

Work-around: Remove component U15

By removing U15, regulator VS6 will always be enabled as it has an internal pull-up on this signal.  This allows the rest of the circuitry to turn on as expected.  The side affect of this work-around is that it is possible that MXP or PMOD expansion boards will remain powered even when the switch is in the CHRG position.

Bryan

[bhfletcher]

This is covered in detail in the S6LX16 Rev B Errata which is posted on the DRC:  www.em.avnet.com/spartan6lx16-evl --> Support Files & Downloads.

Bryan

[akineko]

> By removing U15, regulator VS6 will always be enabled as it has an internal pull-up on this signal.  

I just want to mention that you can achieve the same thing by lifting the pin4 of the U15 rather than yanking out the device.