Section 10 Ethernet Controller Direct Memory Access Controller (E-DMAC)
Rev. 2.00 Mar 09, 2006 page 460 of 906
REJ09B0292-0200
1), this indicates a buffer for which reception has not yet been performed. If a frame receive error
occurs in the first descriptor part where the RACT bit = 1 in the figure, reception is halted
immediately and a status write-back to the descriptor is performed.
If error interrupts are enabled in the EtherC/E-DMAC status interrupt permission register
(EESIPR), an interrupt is generated immediately after the write-back. If there is a new frame
receive request, reception is continued from the buffer after that in which the error occurred.
0 0
0 0
0 0
0 0
1 0
1 0
1 0
1 0
1 1
1 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
E-DMAC
Inactivates RACT and writes RFE, RFS
Descriptor read
Write-back
Descriptors
Buffer
Received data
Unreceived data
Receive error occurrence
:
:
:
:
:
Start of frame
New frame reception
continues from this buffer
RACT
RDLE
RFP1
RFP0
Figure 10.7 E-DMAC Operation after Receive Error
Содержание SH7616
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Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...