HD6433832S Datasheet, PDF (81/560 Pages) Renesas Technology Corp – single-chip microcomputers

3.3 Interrupts
3.3.1 Overview
The interrupt sources include 13 external interrupts (WKP₀ to WKP₇, IRQ₀ to IRQ₄), and 20
internal interrupts from on-chip peripheral modules. Table 3.2 shows the interrupt sources, their
priorities, and their vector addresses. When more than one interrupt is requested, the interrupt with
the highest priority is processed.
The interrupts have the following features:
• Both internal and external interrupts can be masked by the I bit of CCR. When this bit is set to
1, interrupt request flags are set but interrupts are not accepted.
• The external interrupt pins IRQ₀ to IRQ₄ can each be set independently to either rising edge
sensing or falling edge sensing.
Table 3.2 Interrupt Sources and Priorities
Priority
High
Low
Interrupt Source
RES
IRQ₀
IRQ₁
IRQ₂
IRQ₃
IRQ₄
WKP₀
WKP₁
WKP₂
WKP₃
WKP₄
WKP₅
WKP₆
WKP₇
SCI1
Timer A
Timer B
Timer C
Interrupt
Reset
IRQ₀
IRQ₁
IRQ₂
IRQ₃
IRQ₄
WKP₀
WKP₁
WKP₂
WKP₃
WKP₄
WKP₅
WKP₆
WKP₇
SCI1 transfer complete
Timer A overflow
Timer B overflow
Timer C overflow or underflow
Vector
Number
0
4
5
6
7
8
9
10
11
12
13
Vector Address
H'0000 to H'0001
H'0008 to H'0009
H'000A to H'000B
H'000C to H'000D
H'000E to H'000F
H'0010 to H'0011
H'0012 to H'0013
H'0014 to H'0015
H'0016 to H'0017
H'0018 to H'0019
H'001A to H'001B
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