Felsöker kretskort - allmäna tips?

Aug 13, 2007 1 Replies

Hej,



Jag har ett MIDI-interface, "Midiman midisport 2x2", som slutat fungera.


ansluten.


- En USB-mikrokontrollerenhet, Cypress AN2131S


- En 5V->3.3V DC/DC



- Ytterligare en liten ytmonterad krets som jag inte lyckats identifiera


aktiveras den mha tristatebuffern av Cypress-kretsen.


Ur manualen: Multiplexed pin whose function is selected by the WR bit of the PORTCCFG register. If WR=0, the pin is the bi-directional I/O port bit PC6. If WR=1, the pin is the active-low write signal for external memory. If the WR# signal is used, it should be externally pulled up to Vcc to ensure that the write strobe is inactive at power-on.



Har inte satt mig in djupare i hur USB-kretsen fungerar, men den verkar


MVH Carl


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Mjukvarufel? Drivrutin? Har du kollat i Enhetshanteraren i Windows

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