OESF Portables Forum

Everything Else => Sharp Zaurus => Model Specific Forums => Distros, Development, and Model Specific Forums => Archived Forums => C1000/3x00 General discussions => Topic started by: lixy on January 14, 2005, 02:34:16 pm

Title: Usb 2.0 On The Sl-c3000
Post by: lixy on January 14, 2005, 02:34:16 pm: Hi all,

On their website, Dynamism (http://www.dynamism.com/sl-c3000/) claims that :

'And, since the Zaurus's HDD is plug-n-play recognized by Windows, moving data is by USB 2.0 connection is fast and easy'

Whereas this French guy (http://akiba.sorobangeeks.com/revue_32.html) says

'Petit bÃ©mol ici tout de mÃªme, c'est que la connection USB n'est pas USB 2 mais 1'

Which means that it only got USB 1 not 2.0.

Planning to acquire the machine shortly I would be greatful if anybody could attest that it supports USB 2.0.

Thanks
Title: Usb 2.0 On The Sl-c3000
Post by: darkloran on January 14, 2005, 03:20:47 pm: s
Title: Usb 2.0 On The Sl-c3000
Post by: spartan on January 14, 2005, 04:40:44 pm: No, it does not support USB 2.0.
Title: Usb 2.0 On The Sl-c3000
Post by: lixy on January 14, 2005, 05:56:57 pm: There are apparently several opinions on the subject (Interpreting Darkloran answer as yes). Thanks anyway for the prompt replies.
Title: Usb 2.0 On The Sl-c3000
Post by: spartan on January 15, 2005, 12:03:12 pm: You can plug a USB cable/device into the Zaurus, but the physical hardware on the Zaurus is only USB 1.1. Your transfer speeds would be limited to USB 1.1
Title: Usb 2.0 On The Sl-c3000
Post by: daXd on January 15, 2005, 05:13:06 pm: This is main part of usbview message (Zaurus connected as USB mass storage device to Linux box with Fedora Core 1):

SL-C3000
Manufacturer: Sharp
Speed: 12Mb/s (full)
USB Version: 2.00
Device Class: 00(>ifc )
Device Subclass: 00
Device Protocol: 00
Maximum Default Endpoint Size: 16
Number of Configurations: 1
Vendor Id: 04dd
Product Id: 9050
Revision Number: 0.00
Title: Usb 2.0 On The Sl-c3000
Post by: darkloran on January 19, 2005, 02:14:22 am: Quote
Interpreting Darkloran answer as yes

oups... i'm wondering what happened to my post... i'm sorry about that.

well my answer was...

Quote
it seems to be only USB1 according to messages when using the USB host function

and i had provided traces from my "dmesg" that shows a speed of 12Mb/s as mentionned by daXd

loran
Title: Usb 2.0 On The Sl-c3000
Post by: kckong on July 19, 2005, 06:17:04 am: My SL-C3000 with cacko beta does not recognize external USB 2.0 devices (Pen-Drive/HDD etc). But it does support for USB1.0. Is that anyway to let my C3000 communicate with USB2.0 device? Please advice. Many thanks.
Title: Usb 2.0 On The Sl-c3000
Post by: daniel3000 on July 19, 2005, 06:59:04 am: Quote
My SL-C3000 with cacko beta does not recognize external USB 2.0 devices (Pen-Drive/HDD etc). But it does support for USB1.0. Is that anyway to let my C3000 communicate with USB2.0 device? Please advice. Many thanks.
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FWIW: My SL-C300 with Cacko 1.23beta1 does recognize my USB-2.0 "TwinMOS" 512MB pen-drive. It does transfer with USB-1.0 speed only, of course.

Maybe newer USB 2.0 drives are not 1.0 backwards compatible?

daniel
Title: Usb 2.0 On The Sl-c3000
Post by: Tom61 on July 20, 2005, 12:40:36 am: USB client should be 2.0, as the PXA270 processor supports that. Which means copying from your PC to the internal HD should be faster than a USB 1.1 connection.

USB host, using the PXA270 at least, is 1.1 only.

So, indeed, the answer is "yes & no".
Title: Usb 2.0 On The Sl-c3000
Post by: kckong on July 21, 2005, 04:32:40 am: thanks for reply. My problem here is the 3000 does not recognize at all the usb2.0 devices. It's fine if the speed is 1.0

any idea how to make my 3000 recognize usb2.0 device.
Title: Usb 2.0 On The Sl-c3000
Post by: Meanie on July 21, 2005, 07:10:40 am: Quote
thanks for reply. My problem here is the 3000 does not recognize at all the usb2.0 devices. It's fine if the speed is 1.0

any idea how to make my 3000 recognize usb2.0 device.
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I don't think its a USB 2.0 problem per say. There are devices out there that claim to be USB 2.0 but do not actually implement it properly, thus the Z is not able to recognise them. I have used lots of different USB 2.0 devices on my Z and it had no problems with them. I had devices that claimed to be USB 2.0 (but they weren't really) that I plugged into my PC which had a USB 2.0 host and it did not work, but then I tried it with one of my older laptop which only had USB 1.1 host and it worked
Title: Usb 2.0 On The Sl-c3000
Post by: Da_Blitz on July 27, 2005, 08:47:01 am: There are a couple of devices which are usb 2.0 but are not backwards compatible with usb 1.1, i used to think it ws required but i guess i was wrong or they didnt get usb approved

anyway the pxa implemants full speed usb (12Mbps) however it supports the OTG (on the go) spec which is part of usb 2.0, its easy to get confused but it effectivly boils down to a device that can do client and host at 12Mbps

if you don't belive any of this just go and read the Xscale data sheet, it has tons of usefull info in it