H8S2258 Datasheet, PDF (544/1071 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

Section 12 8-Bit Timers
12.7 Interrupt Sources
12.7.1 Interrupt Sources and DTC Activation
The 8-bit timer can generate three types of interrupt: CMIA, CMIB, and OVI. Table 12.2 shows
the interrupt sources and priority. Each interrupt source can be enabled or disabled independently
by interrupt enable bits in TCR. Independent signals are sent to the interrupt controller for each
interrupt. It is also possible to activate the DTC by means of CMIA and CMIB interrupts.
Table 12.2 8-Bit Timer Interrupt Sources
Interrupt source Description
Flag
Interrupt
DTC Activation Priority
CMIA0
TCORA_0 compare-match CMFA
Possible
High
CMIB0
TCORB_0 compare-match CMFB
Possible
OVI0
TCNT_0 overflow
OVF
Not possible Low
CMIA1
TCORA_1 compare-match CMFA
Possible
High
CMIB1
TCORB_1 compare-match CMFB
Possible
OVI1
CMIA2^*
CMIB2^*
OVI2^*
CMIA3^*
CMIB3^*
OVI3^*
TCNT_1 overflow
TCORA_2 compare-match
TCORB_2 compare-match
TCNT_2 overflow
TCORA_3 compare-match
TCORB_3 compare-match
TCNT_3 overflow
OVF
CMFA
CMFB
OVF
CMFA
CMFB
OVF
Not possible
Possible
Possible
Not possible
Possible
Possible
Not possible
Low
High
Low
High
Low
Note: * Not available in the H8S/2237 Group and H8S/2227 Group.
12.7.2 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. 5.00 Aug 08, 2006 page 458 of 982
REJ09B0054-0500