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參數(shù)資料
| 型號： | PIO-96 |
| 英文描述： | 96 CHANNEL PROGRAMMABLE INPUT/ |
| 中文描述： | 96通道可編程的輸入/ |
| 文件頁數(shù)： | 4/29頁 |
| 文件大?。?/td> | 108K |
| 代理商： | PIO-96 |
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Page 6
User Adjustments
Page 6
01271015.doc
Blue Chip Technology Ltd.
2.2
Setting the Interrupt Channel (JP2)
The PIO-96 card supports the use of the interrupts generated from the
PD71055 chips. These chips are identical functionally to the Intel 8255
integrated circuit. The use of the interrupts provides a means to monitor digital
inputs only when there has been a change at the input signal lines. The use of
interrupts requires the user to write an interrupt handler routine (either in C or
assembler) and install it prior to using the PIO-96 card.
To select an interrupt channel, a link must be set on jumper block JP2. An
interrupt is selected by placing a jumper link on the pair of link pins
corresponding to the desired interrupt channel. All other interrupt channel
links must be left open.
Note: Only one link is permitted on JP2. If more than one link is fitted then
the computer system may not function correctly.
Figure 2 - Setting the Interrupt Channel
The above diagram shows the jumper block JP2 with a link placed on interrupt
channel 3. Please note that the silk screen printing of the interrupt numbers on
the printed circuit board is incorrect. The diagram above shows the correct
sequence.
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