HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 455

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

10.2.17 Transmission-Descriptor Fetch Address Register (TDFAR)
This is the register for storing the descriptor start address that is required when the E-DMAC
fetches descriptor information from the transmission descriptor . Which transmission descriptor
information is used for processing by the E-DMAC can be recognized by monitoring addresses
displayed in this register.
Bits 31 to 0—Transmission-descriptor fetch address (TDFA): This bit can only be read. Writing is
disabled.
Note: The descriptor fetch processing result from the E-DMAC and the value read by the
440
Initial value:
Initial value:
Initial value:
Initial value:
register may not be the same.
R/W:
R/W:
R/W:
R/W:
Bit:
Bit:
Bit:
Bit:
TDFA31 TDFA30 TDFA29 TDFA28 TDFA27 TDFA26 TDFA25 TDFA24
TDFA23 TDFA22 TDFA21 TDFA20 TDFA19 TDFA18 TDFA17 TDFA16
TDFA15 TDFA14 TDFA13 TDFA12 TDFA11 TDFA10
TDFA7
31
23
15
0
R
0
R
0
R
7
0
R
TDFA6
30
22
14
0
R
0
R
0
R
6
0
R
TDFA5
29
21
13
0
R
0
R
0
R
5
0
R
TDFA4
28
20
12
0
R
0
R
0
R
4
0
R
TDFA3
27
19
11
0
R
0
R
0
R
3
0
R
TDFA2
26
18
10
0
R
0
R
0
R
2
0
R
TDFA9
TDFA1
25
17
0
R
0
R
9
0
R
1
0
R
TDFA8
TDFA0
24
16
0
R
0
R
8
0
R
0
0
R