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patching bf707 ez-board vdd_ext to 1.8V - possible?

Question asked by dehkl on Sep 28, 2016
Latest reply on Oct 17, 2016 by Jithul_Janardhanan

I'm connecting some external modules that require 1.8V I/O via the SMC bus and some GPIO to a bf707 ez-board.

Have anyone patched the ez-boards vdd_ext to 1.8V before?

From the schematic the patch it looks pretty straightforward by removing R106 and P10, and instead connect P12 to P10.

I suspect that there could be some issues with the on-board chips, like the soft switches for example.

 

No on-board functions are needed except the cpu and jtag interface.

PB_00 - PB_15 and PA_00, PA_01, PA_02, PA_08, PA_13 and PA_14 are routed to the peripheral. 

 

I don't mind removing a few components if needed.

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