HD6473032F16 Datasheet, PDF (123/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 5 Interrupt Controller
Figure 5.3 shows the timing of the setting of the interrupt flags (IRQnF).
φ
IRQn
input pin
IRQnF
Note: n = 5 to 0
Figure 5.3 Timing of Setting of IRQnF
Interrupts IRQ₀ to IRQ₅ have vector numbers 12 to 17. These interrupts are detected regardless of
whether the corresponding pin is set for input or output. When using a pin for external interrupt
input, clear its DDR bit to 0 and do not use the pin for chip select output, refresh output, or SCI
input or output.
5.3.2 Internal Interrupts
Thirty internal interrupts are requested from the on-chip supporting modules.
• Each on-chip supporting module has status flags for indicating interrupt status, and enable bits
for enabling or disabling interrupts.
• Interrupt priority levels can be assigned in IPRA and IPRB.
• ITU and SCI interrupt requests can activate the DMAC, in which case no interrupt request is
sent to the interrupt controller, and the I and UI bits are disregarded.
5.3.3 Interrupt Exception Vector Table
Table 5.3 lists the interrupt sources, their vector addresses, and their default priority order. In the
default priority order, smaller vector numbers have higher priority. The priority of interrupts other
than NMI can be changed in IPRA and IPRB. The priority order after a reset is the default order
shown in table 5.3.
Rev. 3.00 Mar 21, 2006 page 93 of 814
REJ09B0302-0300