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Buffered Operations with Counter Boards



Hardware: Multifunction DAQ (MIO)

Problem:
Can I do a buffered data operation with my 8253 counter chip data acquisition (DAQ) board? What about the Am9513 counter chip DAQ board?

Solution:
You cannot perform a buffered counter operation with a DAQ device that uses either the 8253 or the Am9513. The only counter chips that support buffered operations are the DAQ STC on E Series devices, the DAQ STC II on M Series devices, the DAQ STC3 on X Series devices, and the NI-TIO on the NI 660x devices.

When performing a buffered data operation with the DAQ STC or NI-TIO, the value stored in the counter register is latched into PC memory on active edges of the gate signal. Using either interrupts or direct memory access (DMA), the count register values are transferred individually to a software buffer. The software buffer can be finite or circular for continuous operations.


Related Links:
KnowledgeBase 4C2E1H84: How Big Is The Onboard Memory For NI-TIO & DAQ STC Counters?
Counter/Timer Hardware Product-Feature Matrix
Products and Services: Counter/Timers

Attachments:





Report Date: 01/22/2002
Last Updated: 09/29/2017
Document ID: 2HLA5TXA

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