Datasheet

Table Of Contents
Section 11 8-Bit Timers (TMR)
Page 362 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
11.7 Interrupts
11.7.1 Interrupt Sources and DTC Activation
There are three 8-bit timer interrupt sources: CMIA, CMIB, and OVI. Their relative priorities are
shown in table 11.3. Each interrupt source is set as enabled or disabled by the corresponding
interrupt enable bit in TCR or TCSR, 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 11.3 8-Bit Timer Interrupt Sources
Channel Name Interrupt Source
Interrupt
Flag
DTC Activation Priority
*
0 CMIA0 TCORA_0 compare match CMFA Possible High
CMIB0 TCORB_0 compare match CMFB Possible
OVI0 TCNT_0 overflow OVF Not possible
1 CMIA1 TCORA_1 compare match CMFA Possible
CMIB1 TCORB_1 compare match CMFB Possible
OVI1 TCNT_1 overflow 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.