--- In l..., tike64@... wrote: >
> ostehaps01 wrote:
> > So you are saying that USB port 1 can be operated without the USB_OVRCR1
> > and USN_PWRD1 signal configured and connected?
>
> Yes - definitely at least hardwarewise. I can't recall anymore, what
software
> hacks I had to do, but I'm definitely using USB memory sticks on USB1 and
both
> PWRD and OVRCR signals are used with LCD.
>
> > I do have problems getting the USB port 1 working. Port 2 works fine.
>
> Do you use the PWRD signal now? If I recall right, PWRD signal was actually
> inverted and I got the thing (different hardware with LPC2468) working only by
> not configuring the pin as PWRD. It is possible that I made a wrong conclusion
> though and it may be part and revision dependent.
As I can see, its noted in the LPC2468 errata sheet that there is a problem with
the USB_PWRDx pins, but in the errata for LPC2478 there is not?
But in host mode, what is the usage of USB_PWRDx pins? Isnt it just a port power
status. So actual it isnt that importent? (Just like over current). Just for SW
usage..
In device mode its the actual Vbus from the host.
thomas
Reply by tike...@gmail.com●April 8, 20102010-04-08
ostehaps01 wrote: > So you are saying that USB port 1 can be operated
without the USB_OVRCR1
> and USN_PWRD1 signal configured and connected?
Yes - definitely at least hardwarewise. I can't recall anymore, what
software
hacks I had to do, but I'm definitely using USB memory sticks on USB1 and
both
PWRD and OVRCR signals are used with LCD.
> I do have problems getting the USB port 1 working.
Port 2 works fine.
Do you use the PWRD signal now? If I recall right, PWRD signal was actually
inverted and I got the thing (different hardware with LPC2468) working only by
not configuring the pin as PWRD. It is possible that I made a wrong conclusion
though and it may be part and revision dependent.
--
Timo
Reply by ostehaps01●April 8, 20102010-04-08
Hallo Timo
So you are saying that USB port 1 can be operated without the USB_OVRCR1 and
USN_PWRD1 signal configured and connected?
I do have problems getting the USB port 1 working. Port 2 works fine.
/thomas
--- In l..., tike64@... wrote: >
> ostehaps01 wrote:
> > I have a question I cant find the solution for reading the manual.
> > Im using a LPC2478. Im interfacing to a LCD display and therby loosing
> > the USB_PWRD1 and USB_OVERCR1 to LCD signals.
> >
> > But is it still posiible to operate the USB host block of the LPC2478?
>
> Yes, I'm doing just that.
>
> --
>
> Timo
>
Reply by tike...@gmail.com●April 8, 20102010-04-08
ostehaps01 wrote: > I have a question I cant find the solution for
reading the manual.
> Im using a LPC2478. Im interfacing to a LCD display and therby loosing
> the USB_PWRD1 and USB_OVERCR1 to LCD signals.
>
> But is it still posiible to operate the USB host block of the LPC2478?
Yes, I'm doing just that.
--
Timo
Reply by ostehaps01●April 8, 20102010-04-08
Hallo
I have a question I cant find the solution for reading the manual.
Im using a LPC2478. Im interfacing to a LCD display and therby loosing the
USB_PWRD1 and USB_OVERCR1 to LCD signals.
But is it still posiible to operate the USB host block of the LPC2478?
Is it still possible to use USB Port 1 without these signals (As far I know the
two signals is used by USB Host block)?
Something that can be done (External IC's, work arounds?) to have 2x USB
host and LCD?