Section 23 Gigabit Ethernet Controller (GETHER)
Rev. 1.00 Oct. 01, 2007 Page 993 of 1956
REJ09B0256-0100
23.6 Usage
Notes
23.6.1 Checksum
Calculation of Ethernet Frames
This LSI is capable of calculating the checksum data of the received frames. Only the data fields
of the Ethernet frames are subject to calculation. Specifically, a data field follows the length/type
field and is followed by the CRC field. Calculation involves 16-bit addition only; it does not
involve bit reversal.
Note: Also for the frames with VLANTag inserted, the 15th byte from the top and the following
bytes before the CRC field are subject to calculation.
Data subject to
checksum
calculation
Destination address
Source address
(6 bytes)
(6 bytes)
Type (2 bytes)
CRC (4 bytes)
Data (46 to 1500 bytes)
Data subject to
checksum
calculation
Destination address
Source address
(6 bytes)
(6 bytes)
VLANtag
(4 bytes)
Type (2 bytes)
CRC (4 bytes)
Data (60 bytes)
Schematic of an Ethernet frame
(with VLANtag)
Schematic of an Ethernet frame
(without VLANtag)
Figure 23.38 Data Subject to Checksum Calculation
23.6.2
Notes on TSU Use
The TSU of this LSI supports up to 100BASE-T data transfers. Therefore, even when The TSU of
this LSI is used with 1000BASE-T, the transfer performance is equal to that with 100BASE-T.
Summary of Contents for SH7763
Page 2: ...Rev 1 00 Oct 01 2007 Page ii of lxvi ...
Page 122: ...Section 2 Programming Model Rev 1 00 Oct 01 2007 Page 56 of 1956 REJ09B0256 0100 ...
Page 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
Page 170: ...Section 4 Pipelining Rev 1 00 Oct 01 2007 Page 104 of 1956 REJ09B0256 0100 ...
Page 282: ...Section 7 Caches Rev 1 00 Oct 01 2007 Page 216 of 1956 REJ09B0256 0100 ...
Page 378: ...Section 9 Interrupt Controller INTC Rev 1 00 Oct 01 2007 Page 312 of 1956 REJ09B0256 0100 ...
Page 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Page 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Page 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Page 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
Page 752: ...Section 18 Power Down Mode Rev 1 00 Oct 01 2007 Page 686 of 1956 REJ09B0256 0100 ...
Page 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Page 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Page 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Page 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Page 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Page 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Page 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
Page 2025: ......
Page 2026: ...SH7763 Hardware Manual ...