Datasheet

Section 5 Interrupt Controller
REJ09B0140-0900 Rev. 9.00 Page 93 of 846
Sep 16, 2010
H8S/2215 Group
The setting for IRQnF is shown in figure 5.3.
IRQn
input pin
IRQnF
φ
Note: n = 7 to 0
Figure 5.3 Set Timing for IRQnF
The detection of IRQn interrupts does not depend on whether the relevant pin has been set for
input or output. However, when a pin is used as an external interrupt input pin, do not clear the
corresponding DDR to 0; and use the pin as an I/O pin for another function. IRQnF interrupt
request flag is set when the setting condition is satisfied, regardless of IER settings. Accordingly,
refer to only necessary flags.
5.4.2 Internal Interrupts
The sources for internal interrupts from on-chip peripheral modules have the following features:
• For each on-chip peripheral 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 DMAC or DTC can be activated by a TPU, SCI, or other interrupt request.
• When the DMAC or DTC is activated by an interrupt request, it is not affected by the interrupt
control mode or CPU interrupt mask bit.
5.5 Interrupt Exception Handling Vector Table
Table 5.2 shows interrupt exception handling sources, vector addresses, and interrupt priorities.
For default priorities, the lower the vector number, the higher the priority. Priorities among
modules can be set by means of the IPR. Modules set at the same priority will conform to their
default priorities. Priorities within a module are fixed.