HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 159

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

8-Level Control: In interrupt control mode 2, 8-level mask level determination is performed for
the selected interrupts in interrupt acceptance control according to the interrupt priority level
(IPR).
The interrupt source selected is the interrupt with the highest priority level, and whose priority
level set in IPR is higher than the mask level.
Table 5.7
Interrupt Control Mode
0
2
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:
X:
IM: Used as interrupt mask bit
PR: Sets priority
—:
Notes: 1. Set to 1 when interrupt is accepted.
Interrupt
Control
Mode
: Interrupt operation control performed
0
2
No operation (All interrupts enabled)
Not used
2. Keep the initial setting.
INTM1 INTM0
Interrupts Selected in Each Interrupt Control Mode (2)
Operations and Control Signal Functions in Each Interrupt Control Mode
0
1
Setting
0
0
X
Selected Interrupts
All interrupts
Highest-priority-level (IPR) interrupt whose priority level is greater
than the mask level (IPR > I2 to I0)
Acceptance
Interrupt
Control
— *
IM
I
1
X
8-Level Control
I2 to I0
IM
—
Rev.6.00 Sep. 27, 2007 Page 129 of 1268
— *
IPR
PR
2
Section 5 Interrupt Controller
Default Priority
Determination
REJ09B0220-0600
T (Trace)
—
T