HD6432621 Hitachi, HD6432621 Datasheet - Page 153
HD6432621
Manufacturer Part Number
HD6432621
Description
(HD64F262x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432621.pdf
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Figure 5-4 shows a block diagram of the priority decision circuit.
(1) Interrupt Acceptance Control
In interrupt control mode 0, interrupt acceptance is controlled by the I bit in CCR.
Table 5-6 shows the interrupts selected in each interrupt control mode.
Table 5-6
Interrupt Control Mode
0
2
Interrupt source
Interrupts Selected in Each Interrupt Control Mode (1)
Figure 5-4 Block Diagram of Interrupt Control Operation
Interrupt Mask Bits
I
0
1
*
Interrupt
control
mode 0
Interrupt control mode 2
IPR
mask control
acceptance
Interrupt
control
8-level
I2 to I0
I
Default priority
determination
Selected Interrupts
All interrupts
NMI interrupts
All interrupts
Vector number
* : Don't care
109
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