Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

USB 1.1 to USB 2.0 adapter

Status
Not open for further replies.

hassan_05

Newbie level 4
Joined
Apr 23, 2009
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,313
hi
I want the cicut diagrame to convert usb 1.1 to usb 2.0 if any one could have this plz reply the post
 

tpetar

Advanced Member level 5
Joined
Sep 27, 2010
Messages
6,427
Helped
1,712
Reputation
3,454
Reaction score
1,677
Trophy points
1,393
Location
Pancevo-Belgrade, Serbia
Activity points
37,376
What to do with speed difference ?

Try to insert PCI USB 2.0 card to desktop PC or for notebook/laptop use PCMCIA USB 2.0 cards.
 

pjmelect

Advanced Member level 2
Joined
May 13, 2012
Messages
521
Helped
120
Reputation
240
Reaction score
119
Trophy points
1,323
Activity points
4,255
You can add a 1.5K pull up resistor to the D+ line to the 3.3V instead of the pull up resistor on the D- line, to indicate that the device is a USB2 device, however this does not mean that it will work at USB2 speeds. Interestingly some unscrupulous Chinese trades did this mod to convert USB1 devices to USB2 devices to sell at a higher price, but in most cases this proved to be very unreliable.

https://www.edaboard.com/thread258612.html


Edit: You will also need to change the firmware on the USB device to make it run at the higher speeds, and although you may find the manufacturers reprogramming utility on the web the device may not work or work unreliably.
 
Last edited:

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
46,926
Helped
13,918
Reputation
28,084
Reaction score
12,563
Trophy points
1,393
Location
Bochum, Germany
Activity points
273,701
The question seems to involve a misunderstanding of the USB standard.

USB1.1 defines low speed (1.5 MBPS) and full speed (12 MBPS) device operation. USB 2.0 adds high speed (480 MBPS) operation. But at USB 2.0 does not necessarily imply high speed or full speed devices. It's a matter of the interface hardware capabilities and can't be "converted". For a host or hub, USB 2.0 implies high speed, but there's neither a way to convert a 1.1 to a 2.0 host or hub controller.
 
Last edited:

hassan_05

Newbie level 4
Joined
Apr 23, 2009
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,313
thanks for all the replies they were really helpfull the problem is u can provide extra ampare to +5v but what about the speed is there any circut besided PCVI or pcmcia card to make simple adjustment to converet 1.1 usb to usb 2.0
 

tpetar

Advanced Member level 5
Joined
Sep 27, 2010
Messages
6,427
Helped
1,712
Reputation
3,454
Reaction score
1,677
Trophy points
1,393
Location
Pancevo-Belgrade, Serbia
Activity points
37,376
thanks for all the replies they were really helpfull the problem is u can provide extra ampare to +5v but what about the speed is there any circut besided PCVI or pcmcia card to make simple adjustment to converet 1.1 usb to usb 2.0
My friend, USB is considered for current up to 0,5A but you can use external power supply of 5V for USB hosts, like small external hard disk which need lots of power.

circuit-diagram.jpg


If you dont whant to use PCI and PCMCIA for USB 2.0 then is time to by new PC or change motherboard with some newer. Other way dont exist, based on my knowledge about that.

You can buy multiport USB 2.0 Hub and put in USB 1.1 port on PC, you will still get problem with lots of USB devices. I dont whant to mention speed differences its obvious. Lots of devices need USB 2.0 and cant work on USB 1.1

My friend its simple from granny you cant make beauty. :wink:
 
Last edited:

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top