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Figure 5-3 shows the timing of setting IRQnF.
φ
IRQn
input pin
IRQnF
The vector numbers for IRQ7 to IRQ0 interrupt exception handling are 23 to 16.
Detection of IRQ7 to IRQ0 interrupts does not depend on whether the relevant pin has been set for
input or output. Therefore, when a pin is used as an external interrupt input pin, do not clear the
corresponding DDR bit to 0 and use the pin as an I/O pin for another function.
5.3.2
Internal Interrupts
There are 43 sources for internal interrupts from on-chip supporting modules.
• For each on-chip supporting module there are flags that indicate the interrupt request status,
and enable bits that select enabling or disabling of these interrupts. If both of these are set to 1
for a particular interrupt source, an interrupt request is issued to the interrupt controller.
• The interrupt priority level can be set by means of IPR.
• The DTC can be activated by a TPU, SCI, or other interrupt request. When the DTC is
activated by an interrupt, the interrupt control mode and interrupt mask bits have no effect.
5.3.3
Interrupt Exception Vector Table
Table 5-4 shows interrupt exception handling sources, vector addresses, and interrupt priorities.
For default priorities, the lower the vector number, the higher the priority. The DTC can also be
activated by some interrupt sources.
Priorities among modules can be set by means of IPR. The situation when two or more modules
are set to the same priority, and priorities within a module, are fixed as shown in table 5-4.
Rev. 5.00, 12/03, page 118 of 1088
Figure 5-3 Timing of Setting IRQnF
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