HP50G USB - High Speed (480Mbs), Full Speed (12Mbs), or Low Speed (1.5Mbs)

HP50G USB - High Speed (480Mbs), Full Speed (12Mbs), or Low Speed (1.5Mbs)

Post by pynnone » Tue, 17 Oct 2006 23:07:08


Which USB speed(s) does the HP50G support?
Is it in any of the HP documentation anywhere?
 
 
 

HP50G USB - High Speed (480Mbs), Full Speed (12Mbs), or Low Speed (1.5Mbs)

Post by Veli-Pekka » Wed, 18 Oct 2006 01:15:40


115200 (I think it's then the low speed)

 
 
 

HP50G USB - High Speed (480Mbs), Full Speed (12Mbs), or Low Speed (1.5Mbs)

Post by pynnone » Wed, 18 Oct 2006 09:03:14

115,200 is a standard RS-232 serial baud rate.

The USB should be one of 3 speeds: Low Speed (1.5Mbs) Full Speed
(12Mbs) or High Speed). USB does not support 115,200.

HP also does not have a USB.org sponsored logo. It does not indicate if
it is USB 1.1 or USB 2.0. Most high speed devices have a USB.org logo
that says :"Hi-Speed"

Are any of the HP engineers lurking in this group, who can answer the
question? The HP Help Center can't.
 
 
 

HP50G USB - High Speed (480Mbs), Full Speed (12Mbs), or Low Speed (1.5Mbs)

Post by mats » Wed, 18 Oct 2006 09:40:48


Windows "connects" to a USB 1.1 device (a 49g+ but I think this also
applies to a 50g), on full speed (12Mbs), sucking 50mA (how that for
49g+? - ah windows...). But this is a theoretical speed limit, in
practice (Xmodem) I get about 14kB/s = 115,200bps. I guess this is what
you get using the Xmodem protocol - sort of "RS-232 on USB".
 
 
 

HP50G USB - High Speed (480Mbs), Full Speed (12Mbs), or Low Speed (1.5Mbs)

Post by bokubo » Wed, 18 Oct 2006 09:56:03

The system profiler on my mac says:

HPx9G+ Device:

Version: 1.00
Bus Power (mA): 500
Speed: Up to 12 Mb/sec
Manufacturer: HP Company
Product ID: 0x0121
Vendor ID: 0x03f0

When I transfer files with HPConnect (by Michael W. Heinz, Sr) I get
speeds in the 115,200 range. Given the memory of these devices, I
can't see how it would make an appreciable difference though.

-Jonathan