Hitachi H8S/2678 Series Reference Manual page 107

Table 3.13 Interrupt Source Selection and Clearing Control
DMAC
DTA DTCE
0 0
1
1
*
Legend
: The relevant interrupt is used. Interrupt source clearing is performed.
(The CPU should clear the source flag in the interrupt service routine.)
: The relevant interrupt is used. The interrupt source is not cleared.
X : The relevant bit cannot be used.
* : Don't care
Usage Note: SCI and A/D converter interrupt sources are cleared when the DMAC or DTC reads
or writes to the prescribed register, and are not dependent on the DTA and DISEL bits.
90
Settings
DTC
DISEL
*
0
1
*
Interrupt Source Selection/Clearing Control
DMAC DTC
X
X
CPU
X
X