Section 13 Controller Area Network (HCAN)
Rev. 3.00 Mar. 14, 2006 Page 502 of 804
REJ09B0104-0300
13.6 DMAC
Interface
The DMAC can be activated by the reception of a message in HCAN mailbox 0. When the
DMAC activation is set and DMAC transfer ends, flags RXPR0 and RFPR0 are automatically
cleared. An interrupt request is not sent to the CPU by a reception interrupt from the HCAN.
Figure 13.15 shows a DMAC transfer flowchart.
DMAC initialization
Activation source, source address,
destination address, transfer count, and
Yes
Yes
: Settings by user
: Processing by hardware
No
No
Message reception in HCAN's
mailbox 0
DMAC interrupt enable = 1?
DMAC activation
End of DMAC transfer?
DMAC transfer end bit setting
RXPR and RFPR clearing
Interrupt to CPU
End
DMAC interrupt flag clearing
Figure 13.15 DMAC Transfer Flowchart
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Содержание H8SX series
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