Hi, please check this schematic.
It's a breakout board for atmega 128.
What I really want to know is if the programming headers are correct, and if the chip in the left (FT232RL) is wired right (for a self powered device). The rightmost header (P-USB) is actually connected to a USB device connector, which has the pins, when in line as V+, GND, D+, D-. I'm not aware if the converter needs grounding if the 3.3 is not used. DS says it uses an internal oscillator.
Also, what should I do with the PEN pin on the atmega?
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