HD6432633 Datasheet, PDF (700/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

13.4 Interrupts
13.4.1 Interrupt Sources and DTC Activation
(The H8S/2695 does not have a DTC function or an 8-bit timer)
There are three 8-bit timer interrupt sources: CMIA, CMIB, and OVI. Their relative priorities are
shown in table 13-3. Each interrupt source is set as enabled or disabled by the corresponding
interrupt enable bit in TCR, and independent interrupt requests are sent for each to the interrupt
controller. It is also possible to activate the DTC by means of CMIA and CMIB interrupts.
Table 13-3 8-Bit Timer Interrupt Sources
Channel Interrupt Source
Description
DTC Activation
Priority
0
CMIA0
Interrupt by CMFA
Possible
High
CMIB0
Interrupt by CMFB
Possible
OVI0
Interrupt by OVF
Not possible
1
CMIA1
Interrupt by CMFA
Possible
CMIB1
Interrupt by CMFB
Possible
OVI1
Interrupt by OVF
Not possible
2
CMIA2
Interrupt by CMFA
Possible
CMIB2
Interrupt by CMFB
Possible
OVI2
Interrupt by OVF
Not possible
3
CMIA3
Interrupt by CMFA
Possible
CMIB3
Interrupt by CMFB
Possible
OVI3
Interrupt by OVF
Not possible
Low
Note: This table shows the initial state immediately after a reset. The relative channel priorities
can be changed by the interrupt controller.
13.4.2 A/D Converter Activation
The A/D converter can be activated only by channel 0 compare match A.
If the ADTE bit in TCSR0 is set to 1 when the CMFA flag is set to 1 by the occurrence of channel
0 compare match A, a request to start A/D conversion is sent to the A/D converter. If the 8-bit
timer conversion start trigger has been selected on the A/D converter side at this time, A/D
conversion is started.
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