SH7670 Datasheet, PDF (551/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 14 DMAC That Works with Encryption/Decryption and Forward Error Correction Core (A-DMAC)
14.2.15 FEC DMAC Processing Descriptor 0 Register (FECD00) [Control]
Do not write any value to this register when FECC_E is set to 1.
Bit: 31
Inital Value: 0
R/W: R/W
30
0
R/W
29
0
R/W
28
0
R/W
27
0
R/W
26
0
R/W
25 24 23 22
FECD00_SZ[15:0]
0
0
0
0
R/W R/W R/W R/W
21
0
R/W
20
0
R/W
19
0
R/W
18
0
R/W
17
0
R/W
16
0
R/W
Bit: 15 14 13 12
FECD00_DO[3:0]
Inital Value: 0
0
0
0
R/W: R/W R/W R/W R/W
11 10 9
8
FECD00_SO[3:0]
0
0
0
0
R/W R/W R/W R/W
7
6
5
4
3
2
1
0
FECD00_SN[3:0]
FECD00_ FECD00_ FECD00_ FECD00_
DRE
F2
F1
F0
0
0
0
0
0
0
0
0
R/W R/W R/W R/W R/W R/W R/W R/W
Bit
Bit Name
Initial
Value R/W Description
31 to 16 FECD00_SZ[15:0] All 0 R/W Data Size (Byte Length)
Specify the byte size of data to be processed. Set a
value from 0 to 65504. Do not set a value from
65505 to 65536.
The Ethernet payload length is 1500 bytes. The FEC
payload length further becomes less than the
Ethernet payload length because the FEC packet
payload does not exist in the RTP of the UDP in IP.
If the MPEG-2TS packet size is considered, it is
highly likely that 1344 bytes will be used as the IP-
TV payload length. Consider 1344 bytes as typ.
Rev. 1.00 Nov. 14, 2007 Page 525 of 1262
REJ09B0437-0100