HD6432646 Hitachi, HD6432646 Datasheet - Page 611

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Initialization
Receive data setting
Clear all RXPR bit in the mailbox, which
Local acceptance filter settings
enables the receive interupts
Mailbox (RAM) initialization
Arbitration field setting
requests in the MBIMR
Message control read
Message data read
Message reception
(Match of identifier
Interrupt settings
Same RXPR = 1?
Interrupt to CPU
End of reception
MBCR setting
BCR setting
Data frame?
in mailbox?)
Clear IRR1
IMR1 = 1?
IRR1 = 1
RXPR
Yes
No
Yes
No
Figure 15-9 Reception Flowchart
No
Yes
No
Yes
mailbox, which enables the receive interupt
Transmission of data frame corresponding
Clear all RXPRn and RFPRn bits in the
requests in the MBIMR
Message control read
IRR2 = 1, IRR1 = 1
Message data read
Clear IRR2, IRR1
RXPR, RFPR = 1
Unread message
Interrupt to CPU
to remote frame
IMR2 = 1?
No
: Settings by user
: Processing by hardware
Yes
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