Contec AD12-16(PCI), Руководство пользователя

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Functions and Operating Procedures
AD12-64(PCI), AD12-16(PCI)
45
Interrupt function
The board is allowed to use hardware interrupt for a PC. An
interrupt level specified by PCI BIOS is used for interrupt. When
using the interrupt function, interrupt sources can be selected from
the following statuses in advance. (Two or more statuses can be
selected.)
Description
Data Read Enable Data read enable status is set.
Data Over Write Error Data overwrite error status is set.
Sampling Clock Input Sampling clock is input (external/internal)
Sampling Clock Error Sampling clock error status is set.
Ext. Trigger Input * External trigger is input (falling edge)
Ext. Trigger Input O/R * External trigger is input when external trigger input status is set.
Timer Count Up * Timer is counted up.
Timer Count Up O/R * Time is counted up when timer count up status is set.
* The statuses are discussed in later sections.
Status
Interrupt request signal is generated simultaneously when the status
specified as interrupt source is set. If two or more interrupt
sources have been specified, a cause of interrupt can be identified
by inputting status within interrupt handler.
Specifying interrupt sources
Specify interrupt source. The following are the control ports for
specifying interrupt sources:
Outputting "1" for an interrupt source masks the cause. Outputting
"0" specifies the item as an interrupt source.
[1] Masked * Initial status
[0] Interrupt Request Enable
+8
(+08h)
Command
0 0 0 0 1 0 0 0
Output
D 7
D 6
D 5 D 4 D 3 D 2 D 1 D 0
+12
(+0ch)
Setting data 0 (interrupt sources)
Timer
O/R Status
Sampling
Clock Error
Data Over
Write Error
Data Read
Enable
Sampling
Clock Input
1
Output
D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0
+13
(+0dh)
Ext. Trigger
Status
Ext. Trigger
O/R Status
1
1
1
1
1 1
Setting data 1 (interrupt sources)
1
Timer
Status