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This appendix contains a list of commonly asked questions and answers 
relating to usage and special features of the NI PCI-6110/6111.

The NI PCI-6110/6111 is a switchless and jumperless enhanced 
Multifunction DAQ device that uses the DAQ-STC for timing.

The DAQ-STC is the system timing control application-specific integrated 
circuit (ASIC) designed by NI and is the backbone of the 
NI PCI-6110/6111. The DAQ-STC contains seven 24-bit counters and 
three 16-bit counters. The counters are divided into the following three 
groups: 

•

AI—two 24-bit, two 16-bit counters

•

AO—three 24-bit, one 16-bit counters

•

General-purpose counter/timer functions—two 24-bit counters

The groups can be configured independently with timing resolutions of 
50 ns or 10 

µs. With the DAQ-STC, you can interconnect a wide variety of 

internal timing signals to other internal blocks. The interconnection scheme 
is quite flexible and completely software configurable. New capabilities 
such as buffered pulse generation, equivalent time sampling, and seamless 
changes to the sampling rate are possible.

Sampling rate is the fastest you can acquire data on the device and still 
achieve accurate results. The NI PCI-6110/6111 has a sampling rate of 
5 MS/s. This sampling rate is at 5 MS/s regardless if 1 or 4 channels are 
acquiring data.