Section 23 Gigabit Ethernet Controller (GETHER)
Rev. 1.00 Oct. 01, 2007 Page 968 of 1956
REJ09B0256-0100
23.4.4 Relay
(1) Relay Procedure and Processing Flow
The GETHER has a function to relay frames received by either E-MAC0 or E-MAC1 to the other
E-MAC. When relay is enabled, frames input from the E-MAC are sent to both relay FIFO and
receive FIFO in the TSU, and determined independently whether to receive or not by the receive
system and whether to relay or not by the relay system. To perform relay, both E-MAC controllers
should be set as promiscuous mode, and the MAC address in both E-MAC controllers should be
the same one (hereafter this MAC address is referred to as MAC address of this LSI).
The relay frame processing (relay/discard) is set by
the TSU_FWSL0 and TSU_FWSL1. Frames
passing the relay FIFO during relaying are sent to the GMII/MII/RMII from E-MAC-1 in a relay
from E-MAC0 to E-MAC1, from E-MAC0 in a relay from E-MAC1 to E-MAC0. At this time,
collision with the relay frames from the E-DMAC may occur. The priority of the process when
collision occurs can be set by TSU_PRISL0/1. When the relay FIFO use exceeds the
TSU_PRISL0/1 setting, frame transmission from the relay FIFO takes priority. By using this
function, lost frames due to relay FIFO overflow can be prevented.
For multicast frames and frames their destinations are other than this LSI, the CAM evaluation in
frame relay processing can be referenced (for details on the CAM function, refer to section 23.4.5,
CAM Function). Table 23.4 shows the settings of the relay frame processing (without CAM).
Table 23.4 Relay Frame Process (Without CAM)
Frame Type
Relay Function Setting
Register Bit
Frame Processing
FW40/1 = 0
Discarded
Frame for this LSI
FW40/1 = 1
Relayed
FW30/1 = 0
Discarded
Broadcast frame
FW30/1 = 1
Relayed
FW20/1 = 0
Discarded
Multicast frame
FW20/1 = 1
Relayed
FW10/1 = 0
Discarded
Frames having destinations other than this
LSI
FW10/1 = 1
Relayed
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 ...
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