HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 91

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

Clear interrupt request flag to 0
Set port mode register bit
Execute NOP instruction
Figure 3.7 Port Mode Register Setting and Interrupt Request Flag
CCR I bit
CCR I bit
1
0
Clearing Procedure
Interrupts masked. (Another possibility
is to disable the relevant interrupt in
interrupt enable register 1.)
After setting the port mode register bit,
first execute at least one instruction
(e.g., NOP), then clear the interrupt
request flag to 0
Interrupt mask cleared
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