Datasheet

Section 5 Interrupt Controller
R01UH0166EJ0600 Rev. 6.00 Page 145 of 1434
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
(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.