HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 172

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 5 Interrupt Controller
(2) Determination of Priority
The DTC activation source is selected in accordance with the default priority order, and is not
affected by mask or priority levels. See section 7.3.3, DTC Vector Table, for the respective
priorities.
(3) Operation Order
If the same interrupt is selected as a DTC activation source and a CPU interrupt source, the DTC
data transfer is performed first, followed by CPU interrupt exception handling.
Table 5.10 summarizes interrupt source selection and interrupt source clearance control according
to the settings of the DTCE bit of DTCEA to DTCEF in the DTC and the DISEL bit of MRB in
the DTC.
Table 5.10 Interrupt Source Selection and Clearing Control
DTCE
0
1
Legend:
X : The relevant bit cannot be used.
* : Don't care
(4) Usage Note
SCI and A/D converter interrupt sources are cleared when the appropriate DTC register is read or
written to, and are independent of the DISEL bit.
Rev.3.00 Mar. 26, 2007 Page 130 of 772
REJ09B0355-0300
: The relevant interrupt is used. Interrupt source clearing is performed.
: The relevant interrupt is used. The interrupt source is not cleared.
(The CPU should clear the source flag in the interrupt handling routine.)
Settings
DTC
DISEL
*
0
1
DTC
X
Interrupt Source Selection/Clearing Control
CPU
X