Hitachi H8S/2338 Series Hardware Manual page 46

Figure 3-4 shows a block diagram of the priority decision circuit.
Interrupt source
Figure 3-4 Block Diagram of Interrupt Control Operation
Interrupt Acceptance Control: In interrupt control mode 0, interrupt acceptance is controlled by
the I bit in CCR.
Table 3-6 shows the interrupts selected in each interrupt control mode.
Table 3-6 Interrupts Selected in Each Interrupt Control Mode (1)
Interrupt Control Mode
0
2
Interrupt
control
mode 0 I
Interrupt
acceptance
control
8-level
mask control
I2 to I0
IPR
Interrupt control mode 2
Interrupt Mask Bits
I
0
1
*
Default priority
Vector number
determination
Selected Interrupts
All interrupts
NMI interrupts
All interrupts
* : Don't care
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