h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 183

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

(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
Legend:
Notes: 1. Set to 1 when interrupt is accepted.
Interrupt
X:
IM: Used as interrupt mask bit
PR: Sets priority.
—:
Control
Mode
: Interrupt operation control performed
0
2
No operation (All interrupts enabled).
Not used.
2. Keep the initial setting.
INTM1 INTM0
Operations and Control Signal Functions in Each Interrupt Control Mode
0
1
Setting
0
0
Interrupt Acceptance
X
Control
— *
IM
I
1
X
8-Level Control
Rev. 6.00 Feb 22, 2005 page 123 of 1484
I2 to I0
IM
—
— *
IPR
PR
Section 5 Interrupt Controller
2
Default Priority
Determination
REJ09B0103-0600
(Trace)
—
T
T