7733 datasheet(840/940 Pages) RENESAS

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KEY INPUT INTERRUPT FUNCTION

7736 Group User’s Manual

5–6

5.2.3 Interrupt function

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The key input interrupt and the INT2 interrupt share the same interrupt vector addresses and interrupt control

ds, the vector addresses for the INT 2 /key input

interrupt) as the interrupt vector addresses; specify the INT2/key input interrupt control register (address 7F16)

as the interrupt control register. Figure 5.2.4 shows the structure of the INT2/key input interrupt control register

when the key input interrupt function is selected.

The operation at accepting a key input interrupt request is the same as that at accepting an INT2 interrupt

request.

5.2 Block description

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Fig. 5.2.4 Structure of INT2/key input interrupt control register when key input interrupt function is selected

INT2

/key input interrupt control register (address 7F16)

Bit

Must be fixed to “0.”

Interrupt request bit

Interrupt priority level selection

bits

Bit name

At reset

Undefined

Functions

0 0 0: Level 0 (Interrupt is disabled.)

0 0 1: Level 1

0 1 0: Level 2

0 1 1: Level 3

1 0 0: Level 4

1 0 1: Level 5

1 1 0: Level 6

1 1 1: Level 7

b2 b1 b0

0: No interrupt request has occurred.

1: Interrupt request has occurred.

Not implemented.

Undefined

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