Guru
Joined: 07/08/2011
Location: AustraliaPosts: 6624
| Posted: 09:40pm 18 Feb 2024 |
Leo, Disclaimer - I don't have a picomiteVGA and have not kept up with the various circuits.
But.
Connect both pin 40s together (and ground). That way power from your USB on the picomiteVGA comes out pin 40 and in pin 40 on the second module and that connects directly to the USB which will power the keyboard. Using pin 40 on both avoids any diodes getting in the way.
The clock and data lines from the usb to ps2 converter pico connect to the pico pins on the picomiteVGA, not to the ps2 port. That way any level shifters on the picomiteVGA are avoided and you have 3.3V to 3.3V = happy camper.
Clear as mud...
Jim