HD6417616 RENESAS [Renesas Technology Corp], HD6417616 Datasheet - Page 447

• Manufacturer Part Number: HD6417616
• Description: 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

10.2
10.2.1
The E-DMAC mode register specifies the operating mode of the E-DMAC. The settings in this
register are normally made in the initialization process following a reset.
Note: Operating mode settings must not be changed while the transmitter and receiver are
Bits 31 to 6—Reserved: These bits are always read as 0. The write value should always be 0.
Bits 5 and 4—Descriptor Length 1, 0 (DL1, DL0): These bits specify the descriptor length,
Bit 5:
DL1
0
1
Bits 3 to 1—Reserved: These bits are always read as 0. The write value should always be 0.
Initial value:
Initial value:
enabled. To change the operating mode, first return the EtherC and E-DMAC modules to
their initial state by means of the software reset bit (SWR) in this register, then make new
settings.
Register Descriptions
E-DMAC Mode Register (EDMR)
Bit 4:
DL0
0
1
0
1
R/W:
R/W:
Bit:
Bit:
31
Description
16 bytes
32 bytes
64 bytes
Reserved (setting prohibited)
—
—
R
R
0
7
0
Section 10 Ethernet Controller Direct Memory Access Controller (E-DMAC)
30
—
—
R
R
0
6
0
R/W
DL1
29
—
R
0
5
0
R/W
DL0
. . .
. . .
. . .
. . .
4
0
Rev. 2.00 Mar 09, 2006 page 421 of 906
11
—
—
R
R
0
3
0
10
—
—
R
R
0
2
0
REJ09B0292-0200
—
—
R
R
9
0
1
0
(Initial value)
SWR
R/W
—
R
8
0
0
0