HP (Hewlett-Packard) PCI-9111DG/HR Manual De Usuario
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Operation Theorem
4
Operation Theorem
The operation theorem of the functions on PCI-9111 card is described in
this chapter. The functions include the A/D conversion, D/A conversion,
Digital I/O and counter / timer. The operation theorem can help you to
understand how to manipulate or to program the PCI-9111.
this chapter. The functions include the A/D conversion, D/A conversion,
Digital I/O and counter / timer. The operation theorem can help you to
understand how to manipulate or to program the PCI-9111.
4.1
A/D Conversion
Before programming the PCI-9111 to perform the A/D conversion, you
should understand the following issues:
should understand the following issues:
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A/D conversion procedure
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A/D signal source control
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A/D trigger source control
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A/D data transfer mode
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A/D Pre-trigger function
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Interrupt System (refer to section 4.2)
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A/D data format
Note:
Because some of the A/D data transfer modes will use the
system interrupt resource. The users have to understand the
interrupt system (section 4.2) at the same time.
system interrupt resource. The users have to understand the
interrupt system (section 4.2) at the same time.