m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 102

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

Fig. 6.10.5 Example of switching procedure for INT
6.10.3 Switching of INT
When the INT
possibility that the corresponding interrupt request bit is set to “1”:
• Switching the factor from the level sense to the edge sense
• Switching the polarity
Therefore, after this switching, make sure to clear the corresponding interrupt request bit to “0.” Figure
6.10.5 shows an example of the switching procedure for the INT
Clear the level sense/Edge sense select bit to “0.”
(1) Switching the factor from the level sense
Note: The above settings must be done separately.
or clear the interrupt disable flag (I) to “0.”
i
to the edge sense
or set the interrupt disable flag (I) to “1.”
interrupt request occurrence factor is switched in one of the following ways, there is a
Set the interrupt priority level to one of
(INT
Clear the interrupt request bit to “0.”
Set the interrupt priority level to 0
Multiple settings must not be done at the same time, in other words, they must not be
done only by 1 instruction.
i
(INT
interrupt request is acceptable.)
(Edge sense is selected.)
i
i
interrupt is disabled.)
to interrupt request occurrence factor
levels 1–7
7905 Group User’s Manual Rev.1.0
i
interrupt request’s occurrence factor
(2) Switching the polarity
or set the interrupt disable flag (I) to “1.”
or clear the interrupt disable flag (I) to “0.”
Clear the interrupt request bit to “0.”
Set the interrupt priority level to 0
Set the interrupt priority level to one of
(INT
(INT
i
Set the polarity select bit.
interrupt request is acceptable.)
i
i
interrupt is disabled.)
interrupt request’s occurrence factor.
levels 1–7
6.10 External interrupts
INTERRUPTS
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