Advantech UNO-3074, User Manual, Page: 28 / 80

UNO-3074 User Manual 20
2.5.6 Interrupt Enable Control Function
The user can choose to enable or disable the interrupt function by writing
its corresponding value to the interrupt disable/enable control bit in the
interrupt control register, as shown in Table 2.6.
2.5.7 Interrupt Triggering Edge Control
The interrupt can be triggered by a rising edge or a falling edge of the
interrupt signal, as determined by the value in the interrupt triggering edge
control bit in the interrupt control register, as shown in Table 2.7.
2.5.8 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 coming interrupt.
Table 2.6: Interrupt Disable/Enable Control
DI0EN & DI1EN Interrupt Disable/Enable Control
0 Disable
1 Enable
Table 2.7: Interrupt Triggering Edge Control
DI0TE & DI1TE Triggering edge of interrupt signal
0 Falling edge trigger
1 Rising edge trigger
Table 2.8: Interrupt Flag Bit Values
DI0F & DI1F Interrupt Status
Read
0 No interrupt
1 Interrupt occur
Write 0 Don’t care
1 Clear interrupt