hd64338342hw Renesas Electronics Corporation., hd64338342hw Datasheet - Page 153

• Manufacturer Part Number: hd64338342hw
• Description: Renesas 8-bit Single-chip Microcomputer H8 Family/h8/300l Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

An alternative method is to avoid the setting of interrupt request flags when pin functions are
switched by keeping the pins at the high level so that the conditions in table 3.5 do not occur.
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 1
CCR I bit 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
Rev. 6.00 Aug 04, 2006 page 117 of 680
Section 3 Exception Handling
REJ09B0145-0600