Switch Of Occurrence Factor Of Int; I Interrupt Request - Renesas 7700 FAMILY User Manual

4.10.2 Switch of occurrence factor of INT

To switch the occurrence factor of INT
___
INT interrupt control register in the sequence shown in Figure 4.10.5 (1). To change the polarity, set the
i
___
INT interrupt control register in the sequence shown in Figure 4.10.5 (2).
i
(1) Switching from level sense to edge sense
Set the interrupt priority level to level 0
( Disable
Clear level sense/edge sense select bit to "0"
( Select edge sense )
Clear interrupt request bit to "0"
Set the interrupt priority level to level 1–7
(Enable acceptance of
Note: Follow the above procedure each. Do not perform 2 or more setting at the same
time, with 1 instruction.
Fig. 4.10.5 Switching flow of occurrence factor of INT
___
interrupt request
i
___
interrupt request from the level sense to the edge sense, set the
i
interrupt )
INT
i
interrupt request)
INT
i
7751 Group User's Manual
4.10 External interrupts (INT
(2) Changing polarity
Set the interrupt priority level to level 0
( Disable
Set polarity select bit
Clear interrupt request bit to "0"
Set the interrupt priority level to level 1–7
(Enable acceptance of
___
interrupt request
i
INTERRUPTS
___
interrupt)
i
interrupt )
INT
i
interrupt request)
INT
i
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