SH7670 Datasheet, PDF (508/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 13 Ethernet Controller Direct Memory Access Controller (E-DMAC)
Transmission flowchart
This LSI + memory
E-DMAC
Transmit FIFO
EtherC
EtherC/E-DMAC
initialization
Descriptor and
transmit
buffer setting
Transmit directive
Descriptor read
Transmit data transfer
Descriptor write-back
Descriptor read
Ethernet
Transmit data transfer
Frame transmission
Descriptor write-back
Transmission
completed
Figure 13.4 Sample Transmission Flowchart
Rev. 1.00 Nov. 14, 2007 Page 482 of 1262
REJ09B0437-0100