SH7764 Datasheet, PDF (846/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 20 Ethernet Controller Direct Memory Access Controller (E-DMAC)
(b) Transmit Descriptor 1 (TD1)
TD1 indicates the length of the transmit buffer.
Initial
Bit
Bit Name Value R/W Description
31 to 16 TBL
All 0
R/W Transmit Buffer Length
Indicates the length of the relevant transmit buffer in
terms of valid bytes.
15 to 0 
All 0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
(c) Transmit Descriptor 2 (TD2)
TD2 indicates the start address of the relevant transmit buffer.
Initial
Bit
Bit Name Value R/W Description
31 to 0 TBA
All 0
R/W Transmit Buffer Address
Indicates the start address of the transmit buffer.
Rev. 1.00 Nov. 22, 2007 Page 790 of 1692
REJ09B0360-0100