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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

2.5.7

Interrupt Triggering Edge Control

The

interrupt can be triggered by a

rising edge or

a falling

edge

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

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

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 79 80

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Advantech UNO-3074 Manuel d'utilisateur Page 30

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