Hi,
FTDI datasheet:
3V3OUT decoupling:
* search for "decoupl" finds 3 occurances. All tell you need to connect a 100nF to 3V3OUT.
* search for "capacitor" finds 4 occurances. 3 of them tell you need to connect a 100nF to 3V3OUT.
* there are 8 example schematics, each of them show the 100nF at 3V3OUT
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Ferrite bead:
(My answer in post#16 was wrong in this: The diode indeed is between UCB connector and FT232. As said in post#19: in doubt keep on the datasheet)
* Now it depends what the diode is for. Is your application only bus powered or mixed powered (bus + self powered). I don´t know.
* but in any case you need a 4u7 at FTDI_VCC. See below.
* 7 of the 8 examples are bus powered. Each of them show the ferrite bead.
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VCC decoupling:
* each of the 8 example schematics show a 100nF combined with a 4u7 at FTDI_VCC. You only have the 100nF at VCC.
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LM3940:
You recognized the ESR limits of the output capacitor?
Klaus