HD64F2149 Datasheet, PDF (155/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Default Priority Determination: The priority is determined for the selected interrupt, and a
vector number is generated.
If the same value is set for ICR, 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 5.7 shows operations and control signal functions in each interrupt control mode.
Table 5.7 Operations and Control Signal Functions in Each Interrupt Control Mode
Interrupt
Control Mode
Setting
INTM1 INTM0
Interrupt Acceptance Control
3-Level Control
I
UI
ICR
0
0
0
O
IM
—
PR
1
1
O
IM
IM
PR
Legend:
O: Interrupt operation control performed
IM: Used as interrupt mask bit
PR: Sets priority
—: Not used
Default Priority
Determination
O
O
T (Trace)
—
—
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