Re: [PIC] USB low speed slower than specs? by "Andrew Warren" .

Jeremy Ladan <piclistRemoveMEspammit.edu> wrote: {Quote hidden}> On some spec sheets I read that USB 1.1 should be able to transfer > 8 Bytes every 10 ms with an interrupt endpoint, which would be > plenty for my needs. When I wrote a short program that just flashes > the LEDs on port B I get 8 bytes every 100ms. > > I have a VB app that sends 8 bytes to the PIC16C765, which then > sends writes the bytes to PORTB. I don't have the PIC sending any > data back to the PC. > .... > Can I get better performance from the 16C765, or will I have to > buy the FS kit? Jeremy: "USB 1.1" covered both low-speed (1.5 Mbit/sec) and full-speed (12 Mbit/sec) USB, but I assume you're talking about low-speed USB. Try sending 64 bytes at a time instead of 8; see if that helps. -Andy === Andrew Warren -- aiwspamBeGonespamBeGonecypress.com === Principal Design Engineer === Cypress Semiconductor Corporation === (but open to offers) === === Opinions expressed above do not === necessarily represent those of === Cypress Semiconductor Corporation