maximum digital IO timing, usb 6501

[operative]

Hi, I am using the USB-6501 to interface with an LCD.  The timing diagram for the LCD shows that one of the lines must be toggled for the purpose of writing to a register must be low for a maximum of 500ns (nano-seconds). 

My question is: can I get this kind of speed out of the USB-6501?   I am running the IO off of Windows, and, from the research that I have conducted, it seems that the fastest timing I can get is 1ms.  

If I can't get this kind of speed from the USB-6501, are there any other IO devices from which I could?  Or, is it just a Windows problem?  

Thanks for your help in advance.

[Jordan F]

The USB-6501 can only do software timing (non deterministic) for digital input/output so you will not be able to reach the 500ns (or 2MHz) rate with this device (1ms was reasonable).  To reach the rate you need you have to use a card with correlated DIO (Hardware timing).  The link below shows some different devices that support correlated DIO.  The High Speed digital I/O cards are available mostly in PCIe, PXIe, PCI but not in USB at this rate.

What Devices Other Than M Series Can Perform Correlated Digital I/O? 

http://digital.ni.com/public.nsf/allkb/08F477754D0535CE862570020007142C

Filtered page to show only correlated DIO cards capable of 2MHz and higher 

http://sine.ni.com/nifn/cds/view/main/p/sn/n20:8470,n4:7852/lang/en/nid/1036/ap/daq