7733 Datasheet, PDF (109/940 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER

KEY INPUT INTERRUPT FUNCTION
5.2 Block description
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
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control register. Specify addresses FFF016 and FFF116 (in other words, the vector addresses for the INT2/
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key input interrupt) as the interrupt vector addresses; specify the INT2/key input interrupt control register
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(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.
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The operation at accepting a key input interrupt request is the same as that at accepting an INT2 interrupt
request.
b7 b6 b5 b4 b3 b2 b1 b0
00
INT2/key input interrupt control register (address 7F 16)
Bit
Bit name
0 Interrupt priority level selection
bits
1
2
Functions
At reset _RW
b2 b1 b0
0 0 0: Level 0 (Interrupt is disabled.)
0
RW
0 0 1: Level 1
0 1 0: Level 2
0 1 1: Level 3
1 0 0: Level 4
0 RW
1 0 1: Level 5
1 1 0: Level 6
1 1 1: Level 7
0 RW
3 Interrupt request bit
4 Must be fixed to “0.”
5
6 Not implemented.
7
0: No interrupt request has occurred. 0 RW
1: Interrupt request has occurred.
0 RW
0 RW
– Undefined
– Undefined
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Fig. 5.2.4 Structure of INT2/key input interrupt control register when key input interrupt function is selected
5–6
7733 Group User’s Manual