Interrupts; Interrupt Sources And Dtc Activation; A/D Converter Activation - Renesas H8S Series Hardware Manual

12.4

Interrupts

12.4.1

Interrupt Sources and DTC Activation

There are three 8-bit timer interrupt sources: CMIA, CMIB, and OVI. Their relative priorities are shown in table 12-3.
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 12-3 8-Bit Timer Interrupt Sources
Channel
0
1
Note: This table shows the initial state immediately after a reset. The relative channel priorities can be changed by the
interrupt controller.
12.4.2

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.
Rev.6.00 Oct.28.2004 page 446 of 1016
REJ09B0138-0600H
Interrupt Source Description
CMIA0 Interrupt by CMFA
CMIB0 Interrupt by CMFB
OVI0 Interrupt by OVF
CMIA1 Interrupt by CMFA
CMIB1 Interrupt by CMFB
OVI1 Interrupt by OVF
DTC Activation Priority
Possible
Possible
Not possible
Possible
Possible
Not possible
High
Low