7702 datasheet(87/217 Pages) RENESAS

87 / 217 page

7702/7703 Group User’s Manual

INTERRUPTS

4–25

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4.10 External interrupts (INTi interrupt)

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4.10.2 Switch of occurrence factor of INTi interrupt request

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To switch the occurrence factor of INTi interrupt request from the level sense to the edge sense, set the

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INTi interrupt control register in the sequence shown in Figure 4.10.5 (1). To change the polarity, set the

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INTi interrupt control register in the sequence shown in Figure 4.10.5 (2).

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 0

( Disable INTi interrupt )

Set polarity select bit

Clear interrupt request bit to “0”

(2) Changing polarity

(1) Switching from level sense to edge sense

Set the interrupt priority level to level 1–7

(Enable acceptance of INTi interrupt request)

Set the interrupt priority level to level 1–7

(Enable acceptance of INTi interrupt request)

Set the interrupt priority level to level 0

( Disable INTi interrupt )

Notes 1: Use the SEB or CLB instruction when setting the INTi interrupt control

2: Perform the above setting separately. Do not perform 2 or more setting at the

same time, with 1 instruction.

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Fig. 4.10.5 Switching flow of occurrence factor of INTi interrupt request

7702 Datasheet(PDF) 87 Page - Renesas Technology Corp