HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 296

• 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)
12.2.4
TDLAR is a 32-bit readable/writable register that specifies the start address of the transmit
descriptor list. Descriptors have a boundary configuration in accordance with the descriptor length
indicated by the DL bit in EDMR. This register must not be written to during transmission.
Modifications to this register should only be made while transmission is disabled by the TR bit
(= 0) in the E-DMAC transmit request register (EDTRR).
12.2.5
RDLAR is a 32-bit readable/writable register that specifies the start address of the receive
descriptor list. Descriptors have a boundary configuration in accordance with the descriptor length
indicated by the DL bit in EDMR. This register must not be written to during reception.
Modifications to this register should only be made while reception is disabled by the RR bit (= 0)
in the E-DMAC Receive Request Register (EDRRR).
Rev. 6.00 Jun. 12, 2007 Page 264 of 610
REJ09B0131-0600
Bit
31 to 0
Bit
31 to 0
Transmit Descriptor List Address Register (TDLAR)
Receive Descriptor List Address Register (RDLAR)
Bit Name
TDLA31 to
TDLA0
Bit Name
RDLA31 to
RDLA0
Initial
value
All 0
Initial
value
All 0
R/W
R/W
R/W
R/W
Description
Transmit Descriptor Start Address
The lower bits are set as follows according to the
specified descriptor length.
16-byte boundary: TDLA3 to TDLA0 = 0000
32-byte boundary: TDLA4 to TDLA0 = 00000
64-byte boundary: TDLA5 to TDLA0 = 000000
Description
Receive Descriptor Start Address
The lower bits are set as follows according to the
specified descriptor length.
16-byte boundary: RDLA3 to RDLA0 = 0000
32-byte boundary: RDLA4 to RDLA0 = 00000
64-byte boundary: RDLA5 to RDLA0 = 000000