Specifications

Chapter 3 Function Description 21
E Triggering edge of interrupt signal
1 Rising edge trigger
0 Falling edge trigger
Table 3-4: Triggering edge control bit values
Interrupt Flag Bit
The "interrupt flag" bit is a flag indicating the status of an interrupt. It is
a readable and writable bit. Read the bit value to find the status of the
interrupt, write "1" to this bit to clear the interrupt. This bit must be
cleared in the ISR to service the next incoming interrupt.
F Interrupt status
1 Interrupt occurred Read
0 No interrupt
1 Clear interrupt Write
0 Don't care
Table 3-5: Interrupt flag bit values
Board ID
Read Base +36 can get the board ID. The PCI-1757UP has a built-in
SMD 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 7. 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-1757UP board ID as 0 at the factory. If you
need to adjust it to other board ID, set the SW1 by referring to the
jumper and SMD switch setting.