Section 23 Gigabit Ethernet Controller (GETHER)
Rev. 1.00 Oct. 01, 2007 Page 980 of 1956
REJ09B0256-0100
(4) Activation
1. Start the E-DMAC transmission/reception function
•
Set the TR bits in EDTRR to 11.
•
Set the RR bit in EDRRR to 1.
2. Start the E-MAC transmission/reception function
•
Set the TE and RE bits in ECMR to 1.
23.4.10 Flow
Control
The GETHER supports flow control functions conforming to IEEE802.3x for full-duplex
operation. The flow control can be applied to both receive and transmit operations. When
transmitting PAUSE frames, flow control can be performed by the following two procedures :
(1) Automatic PAUSE Frame Transmission
For receive frames, PAUSE frames are automatically transmitted when the number of data written
to the receive FIFO reaches the value set in FCFTR. The TIME parameter included in the PAUSE
frame is set by APR. The automatic PAUSE frame transmission is repeated until the number of
data in the receive FIFO becomes less than the value set in FCFTR as the receive data is read from
the FIFO. Using TPAUSER, the upper limit of retransmission counts of the PAUSE frames can
also be set in the range from 1 to 65535. In this case, PAUSE frame transmission is repeated until
the number of receive FIFO data becomes less than the FCFTR value, or the number of transmits
reaches the value set by TPAUSER. The transmission counter is cleared to 0 when the next
PAUSE frame is transmitted after the number of data in the receive FIFO becomes less than the
FCFTR value.
The automatic PAUSE frame transmission is enabled when the TXF bit in ECMR is 1.
(2) Manual PAUSE Frame Transmission
PAUSE frames are transmitted by directives from the software. When writing the Timer value to
MPR, manual PAUSE frame transmission is started. With this method, PAUSE frame
transmission is carried out only once.
Содержание SH7763
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Страница 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
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Страница 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Страница 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Страница 686: ...Section 14 Direct Memory Access Controller DMAC Rev 1 00 Oct 01 2007 Page 620 of 1956 REJ09B0256 0100 ...
Страница 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Страница 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
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Страница 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Страница 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Страница 1060: ...Section 23 Gigabit Ethernet Controller GETHER Rev 1 00 Oct 01 2007 Page 994 of 1956 REJ09B0256 0100 ...
Страница 1062: ...Section 24 IP Security Accelerator SECURITY Rev 1 00 Oct 01 2007 Page 996 of 1956 REJ09B0256 0100 ...
Страница 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Страница 1184: ...Section 27 Serial Communication Interface with FIFO SCIF Rev 1 00 Oct 01 2007 Page 1118 of 1956 REJ09B0256 0100 ...
Страница 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Страница 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Страница 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Страница 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
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