SH7670 Datasheet, PDF (510/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 13 Ethernet Controller Direct Memory Access Controller (E-DMAC)
Reception flowchart
This LSI + memory
E-DMAC
Receive FIFO
EtherC
EtherC/E-DMAC
initialization
Descriptor and
receive
buffer setting
Start of reception
Descriptor read
Ethernet
Frame reception
Receive data transfer
Descriptor write-back
Descriptor read
Receive data transfer
Descriptor write-back
Descriptor read (receive
ready for the next frame)
Reception
completed
Figure 13.5 Sample Reception Flowchart
Rev. 1.00 Nov. 14, 2007 Page 484 of 1262
REJ09B0437-0100