HD6432621 Hitachi, HD6432621 Datasheet - Page 617

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

value at this time, an interrupt can be sent to the CPU. Figure 15-10 shows a flowchart of
unread message overwriting.
Message control/message data read
Unread message overwrite
Interrupt to CPU
Figure 15-10 Unread Message Overwrite Flowchart
Clear IRR9
UMSR = 1
IMR9 = 1?
IRR9 = 1
End
No
Yes
: Settings by user
: Processing by hardware
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