SH7670 Datasheet, PDF (515/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 13 Ethernet Controller Direct Memory Access Controller (E-DMAC)
No. 31
16 15 11 8 7
0
0
1
2
3 IPv4/IPv6/others (Decision)
IHL*
4
Packet length
5
6
Transmit IP
7
Transmit IP
Receive IP
8
Receive IP
9 An option, if any, is deleted from the target of calculation.
10
Data
Note: * This is changed to the octet basis and undergoes a subtraction
during checksum calculation. During calculation,
{8'h00, protocol No.[7:0]} is used.
The following shows the areas as the target of calculation of an IPv6 packet. The shaded portions
are the target of calculation.
Rev. 1.00 Nov. 14, 2007 Page 489 of 1262
REJ09B0437-0100