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HD6432351 Datasheet(PDF) 142 Page - Renesas Technology Corp

Part # HD6432351
Description  16-Bit Single-Chip Microcomputer
PDF  1025 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6432351 Datasheet(HTML) 142 Page - Renesas Technology Corp

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Section 5 Interrupt Controller
Rev. 3.00 Sep 15, 2006 page 108 of 988
REJ09B0330-0300
(3) Default Priority Determination
When an interrupt is selected by 8-level control, its priority is determined and a vector number is
generated.
If the same value is set for IPR, acceptance of multiple interrupts is enabled, and so only the
interrupt source with the highest priority according to the preset default priorities is selected and
has a vector number generated.
Interrupt sources with a lower priority than the accepted interrupt source are held pending.
Table 5.8 shows operations and control signal functions in each interrupt control mode.
Table 5.8
Operations and Control Signal Functions in Each Interrupt Control Mode
Setting
Interrupt Acceptance
Control
8-Level Control
Interrupt
Control
Mode
INTM1
INTM0
I
I2 to I0
IPR
Default
Priority
Determination
T
(Trace)
0
0
0
IM
X
—
—*
2
—
2
1
0
X
—*
1
IM
PR
T
Legend:
: Interrupt operation control performed
X : No operation. (All interrupts enabled)
IM : Used as interrupt mask bit
PR : Sets priority.
— : Not used.
Notes: 1. Set to 1 when interrupt is accepted.
2. Keep the initial setting.



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