Hi Seb,
On 07/30/11 09:21 am, Sebastien Lelong wrote:
<mailto:[email protected]>> Well, the main purposes of these 'usb-blink' samples was to provide a model of how to setup a PIC with USB, in particular the oscillator. I think a serious USB device needs a crystal or resonator. Do you think most users would use the internal oscillator? From what I could read in 18f27J53 datasheet, some PICs can handle USB peripheral without external Xtal (18f27j53 can), but only at low speed, not full speed, and other just can't (18f4550 can't for instance).
As far as I understand the datasheets the 18f27j53 can use both low and full speed USB with the internal oscillator + PLL. The 18f4550 can use USB (and a CPU freq. of 48 MHz) only with an external oscillator because the internal oscillator cannot be input for the PLL module.
So there will not be that many '_usb_blink' samples with internal oscillator.
BTW. I think I'll rename the new samples to 'xxxx_blink_usb', because it is only blinking, usb is not really used.
Regards, Rob. - R. Hamerling, Netherlands --- http://www.robh.nl -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
