Maxim,
The AT-MIO-16E-10, or any other E Series board, will be unable to perform buffered digital output. You will need to consider one of our high-speed digital boards, such as the NI 653x series.
NI PCI-6534
http://sine.ni.com/apps/we/nioc.vp?cid=4575〈=US
Regards,
Justin Britten
Applications Engineer
National Instruments