HD6413007F20 Datasheet, PDF (366/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

9. 16-Bit Timer
9.5.2 Timing of Clearing of Status Flags
If the CPU reads a status flag while it is set to 1, then writes 0 in the status flag, the status flag is
cleared. Figure 9.36 shows the timing.
TISR write cycle
T₁
T₂
T₃
φ
Address
TISR address
IMF, OVF
Figure 9.36 Timing of Clearing of Status Flags
9.5.3 Interrupt Sources and DMA Controller Activation
Each 16-bit timer channel can generate a compare match/input capture A interrupt, a compare
match/input capture B interrupt, and an overflow interrupt. In total there are nine interrupt sources
of three kinds, all independently vectored. An interrupt is requested when the interrupt request flag
are set to 1.
The priority order of the channels can be modified in interrupt priority register A (IPRA). For
details see section 5, Interrupt Controller.
Compare match/input capture A interrupts in channels 0 to 2 can activate the DMA controller
(DMAC). When the DMAC is activated a CPU interrupt is not requested.
Table 9.6 lists the interrupt sources.
Rev.5.00 Sep. 12, 2007 Page 336 of 764
REJ09B0396-0500