HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 318

• Manufacturer Part Number: HD6417618
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 12 Ethernet Controller Direct Memory Access Controller (E-DMAC)
(b) Transmit Descriptor 1 (TD1)
TD1 specifies the transmit buffer length (maximum 64 kbytes).
(c)
TD2 specifies the 32-bit transmit buffer start address. The transmit buffer start address setting can
be aligned with a byte, a word, or a longword boundary.
Rev. 6.00 Jun. 12, 2007 Page 286 of 610
REJ09B0131-0600
Bit
31 to 16
15 to 0
Transmit Descriptor 2 (TD2)
Bit Name
TDL

Initial
value
All 0
All 0
R/W
R/W
R
Description
Transmit Buffer Data Length
These bits specify the valid transfer byte length in the
corresponding transmit buffer.
When the one frame/multi-buffer system is specified
(TD0 and TFP = 10 or 00), the transfer byte length
specified in the descriptors at the start and midway
can be set in byte units.
Reserved
These bits are always read as 0. The write value
should always be 0.