TechTalkz.com Logo Ask the Experts!

Go Back   TechTalkz.com Technology & Computer Troubleshooting Forums > Tech Support Archives > Microsoft > Microsoft Device Drivers

turn off +5V from usb port

Microsoft Device Drivers

 
 
Thread Tools Display Modes
Unread 30-11-2007, 12:27 AM   #1
Gianni Zanone
Guest
 
Posts: n/a
turn off +5V from usb port

I would like to use +5V generated by usb port as switch to turn on and off a
device.
This device has external power supply. I tried to put the device in D3 power
state but the usb port still generates +5V.
Can i do this by software?
 
Unread 30-11-2007, 12:27 AM   #2
Robert Marquardt
Guest
 
Posts: n/a
Re: turn off +5V from usb port

Gianni Zanone wrote:

> I would like to use +5V generated by usb port as switch to turn on and off a
> device.
> This device has external power supply. I tried to put the device in D3 power
> state but the usb port still generates +5V.
> Can i do this by software?


Forget about it. You probably want to abuse the USB for a non-device.
 
Unread 30-11-2007, 12:27 AM   #3
Robert Marquardt
Guest
 
Posts: n/a
Re: turn off +5V from usb port

Gianni Zanone wrote:

> I would like to use +5V generated by usb port as switch to turn on and off a
> device.
> This device has external power supply. I tried to put the device in D3 power
> state but the usb port still generates +5V.
> Can i do this by software?


Forget about it. You probably want to abuse the USB for a non-device.
 
Unread 30-11-2007, 12:27 AM   #4
Robert Marquardt
Guest
 
Posts: n/a
Re: turn off +5V from usb port

Gianni Zanone wrote:

> I would like to use +5V generated by usb port as switch to turn on and off a
> device.
> This device has external power supply. I tried to put the device in D3 power
> state but the usb port still generates +5V.
> Can i do this by software?


Forget about it. You probably want to abuse the USB for a non-device.
 
Unread 30-11-2007, 12:28 AM   #5
Gianni Zanone
Guest
 
Posts: n/a
Re: turn off +5V from usb port

No it is a full functional usb device with driver. Can i do something in the
driver to do that?

"Robert Marquardt" wrote:

> Gianni Zanone wrote:
>
> > I would like to use +5V generated by usb port as switch to turn on and off a
> > device.
> > This device has external power supply. I tried to put the device in D3 power
> > state but the usb port still generates +5V.
> > Can i do this by software?

>
> Forget about it. You probably want to abuse the USB for a non-device.
>

 
Unread 30-11-2007, 12:28 AM   #6
Gianni Zanone
Guest
 
Posts: n/a
Re: turn off +5V from usb port

No it is a full functional usb device with driver. Can i do something in the
driver to do that?

"Robert Marquardt" wrote:

> Gianni Zanone wrote:
>
> > I would like to use +5V generated by usb port as switch to turn on and off a
> > device.
> > This device has external power supply. I tried to put the device in D3 power
> > state but the usb port still generates +5V.
> > Can i do this by software?

>
> Forget about it. You probably want to abuse the USB for a non-device.
>

 
Unread 30-11-2007, 12:28 AM   #7
Gianni Zanone
Guest
 
Posts: n/a
Re: turn off +5V from usb port

No it is a full functional usb device with driver. Can i do something in the
driver to do that?

"Robert Marquardt" wrote:

> Gianni Zanone wrote:
>
> > I would like to use +5V generated by usb port as switch to turn on and off a
> > device.
> > This device has external power supply. I tried to put the device in D3 power
> > state but the usb port still generates +5V.
> > Can i do this by software?

>
> Forget about it. You probably want to abuse the USB for a non-device.
>

 
Unread 30-11-2007, 12:28 AM   #8
Robert Marquardt
Guest
 
Posts: n/a
Re: turn off +5V from usb port

Gianni Zanone wrote:

> No it is a full functional usb device with driver. Can i do something in the
> driver to do that?


So you should already know that a hub is not required to allow power
switching for individual ports.

Why not implementing a command to the device telling it to consume less
power?
 
Unread 30-11-2007, 12:28 AM   #9
Robert Marquardt
Guest
 
Posts: n/a
Re: turn off +5V from usb port

Gianni Zanone wrote:

> No it is a full functional usb device with driver. Can i do something in the
> driver to do that?


So you should already know that a hub is not required to allow power
switching for individual ports.

Why not implementing a command to the device telling it to consume less
power?
 
Unread 30-11-2007, 12:28 AM   #10
Robert Marquardt
Guest
 
Posts: n/a
Re: turn off +5V from usb port

Gianni Zanone wrote:

> No it is a full functional usb device with driver. Can i do something in the
> driver to do that?


So you should already know that a hub is not required to allow power
switching for individual ports.

Why not implementing a command to the device telling it to consume less
power?
 
 

Thread Tools
Display Modes



< Home - Windows Help - MS Office Help - Hardware Support >


New To Site? Need Help?

All times are GMT. The time now is 05:29 PM.


vBulletin, Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO
Copyright © 2005-2013, TechTalkz.com. All Rights Reserved - Privacy Policy
Valid XHTML 1.0 Transitional