I see in a table that the minimum pulse width for the CTRIO and CTRIO2 is listed at 5 microseconds. I see that for the 100khz operation of the CTRIO but wouldn't the minimum for the 250khz capability of the CTRIO2 be more like 2 microseconds?
Edit - it must have been an older table. I see .5 microseconds for the CTRIO2 in the online manual. Never mind.