Table of Contents
Advertisement
Figure 5-3 shows the timing of setting IRQnF.
ø
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. 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.
5.3.2
Internal Interrupts
1
There are 72 *
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 DMAC *
2
and DTC *
request. When the DMAC *
mode and interrupt mask bits are not affected.
Notes: *1 The H8S/2695 has 54 sources for internal interrupts from on-chip supporting modules.
*2 This function is not available in the H8S/2695.
5.3.3
Interrupt Exception Handling Vector Table
Tables 5-4(a) and 5-4(b) show 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. 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.
130
Figure 5-3 Timing of Setting IRQnF
2
can be activated by a TPU, 8-bit timer *
2
and DTC *
2
are activated by an interrupt, the interrupt control
2
, SCI, or other interrupt
Advertisement
Table of Contents
