Advantech PCI-1752, Быстрый старт

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Chapter
4
– 33 – PCI-1752/54/56 User’s Manual
Advantech Co., Ltd.
www.advantech.com
Interrupt Flag Bit
The interrupt flag bit is a flag indicating the status of an interrupt. It is
a readable/writable bit. To find the status of the interrupt, you have to
read the bit value; to clear the interrupt, you have to write “1” to this
bit. This bit must first be cleared to service the next incoming interrupt.
Table 4-5 Interrupt flag bit values
4.2 Board ID
The PCI-1752/1754/1756 has a built-in DIP switch (SW1), which is used
to define each card’s board ID. You can determine the board ID on the
register as shown on Table 4-6. When there are multiple cards on the
same chassis, this board ID setting function is useful for identifying
each card’s device number through board ID. We set the PCI-1752/
1754/1756 board ID as 0 at the factory. If you need to adjust it to other
board ID, set the SW1 by referring to the Table 4-7.
Table 4-6 Board ID register
ID0 : the least significant bit (LSB) of Board ID
ID3 : the most significant bit (MSB) of Board ID
Fn Interrupt status
Read 0 No interrupt
1 Interrupt occur
Write 0 Don’t care
1 Clear interrupt
Board ID register
Base Add.+10
h
3 2 1 0
Abbreviation ID3 ID2 ID1 ID0