Chapter 2 Hardware Functionality
1 5
DI0EN & DI1EN
Interrupt disable/enable control
0
Disable
1
Enable
Table 2-4: Interrupt disable/enable control bit values
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 2-5.
Table 2-5: Interrupt 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/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 flag bit values
DI0TE & DI1TE
Triggering edge of interrupt signal
0
Falling edge trigger
1
Rising edge trigger
DI0F & DI1F
Interrupt Status
Read
0
No interrupt
1
Interrupt occur
Write
0
Don’t care
1
Clear interrupt
