HD6473032F16 Datasheet, PDF (411/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 10 16-Bit Integrated Timer Unit (ITU)
10.5.3 Interrupt Sources and DMA Controller Activation
Each ITU 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 15 interrupt sources, all
independently vectored. An interrupt is requested when the interrupt request flag and interrupt
enable bit are both set to 1.
The priority order of the channels can be modified in interrupt priority registers A and B (IPRA
and IPRB). For details see section 5, Interrupt Controller.
Compare match/input capture A interrupts in channels 0 to 3 can activate the DMA controller
(DMAC). When the DMAC is activated a CPU interrupt is not requested.
Table 10.10 lists the interrupt sources.
Table 10.10 ITU Interrupt Sources
Channel
Interrupt
Source
Description
DMAC
Activatable
Priority^*
0
IMIA0
Compare match/input capture A0
Yes
High
IMIB0
Compare match/input capture B0
No
↑
OVI0
Overflow 0
No
1
IMIA1
Compare match/input capture A1
Yes



IMIB1
Compare match/input capture B1
No

OVI1
Overflow 1
No


2
IMIA2
Compare match/input capture A2
Yes

IMIB2
Compare match/input capture B2
No

OVI2
Overflow 2
No


3
IMIA3
Compare match/input capture A3
Yes

IMIB3
Compare match/input capture B3
No
OVI3
Overflow 3
No



4
IMIA4
Compare match/input capture A4
No

IMIB4
Compare match/input capture B4
No


OVI4
Overflow 4
No
Low
Note: * The priority immediately after a reset is indicated. Inter-channel priorities can be changed
by settings in IPRA and IPRB.
Rev. 3.00 Mar 21, 2006 page 381 of 814
REJ09B0302-0300