HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 312

• 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)
12.2.14 Receiving-Buffer Write Address Register (RBWAR)
RBWAR stores the address of data to be written in the receiving buffer when the E-DMAC writes
data to the receiving buffer. Which addresses in the receiving buffer are processed by the E-
DMAC can be recognized by monitoring addresses displayed in this register. The address that the
E-DMAC is actually processing may be different from the value read from this register.
12.2.15 Receiving-Descriptor Fetch Address Register (RDFAR)
RDFAR stores the descriptor start address that is required when the E-DMAC fetches descriptor
information from the receiving descriptor. Which receiving descriptor information is used for
processing by the E-DMAC can be recognized by monitoring addresses displayed in this register.
The address from which the E-DMAC is actually fetching a descriptor may be different from the
value read from this register.
12.2.16 Transmission-Buffer Read Address Register (TBRAR)
TBRAR stores the address of the transmission buffer when the E-DMAC reads data from the
transmission buffer. Which addresses in the transmission buffer are processed by the E-DMAC
can be recognized by monitoring addresses displayed in this register. The address from which the
E-DMAC is actually reading in the buffer may be different from the value read from this register.
Rev. 6.00 Jun. 12, 2007 Page 280 of 610
REJ09B0131-0600
Bit
31 to 0
Bit
31 to 0
Bit
31 to 0
Bit Name
RBWA31 to
RBWA0
Bit Name
RDFA31 to
RDFA0
Bit Name
TBRA31 to
TBRA0
Initial
value
All 0
Initial
value
All 0
Initial
value
All 0
R/W
R
R/W
R
R/W
R
Description
Receiving-Buffer Write Address
These bits can only be read. Writing is prohibited.
Description
Receiving-Descriptor Fetch Address
These bits can only be read. Writing is prohibited.
Description
Transmission-Buffer Read Address
These bits can only be read. Writing is prohibited.