參數(shù)資料
型號: E-1110
英文描述: E-1110 10/100/1000 Mbits/s Ethernet MAC preliminary technical manual 4/01
中文描述: 電子1110 10/100/1000 Mbits /秒以太網(wǎng)MAC初步的技術(shù)手冊4 / 01
文件頁數(shù): 31/108頁
文件大?。?/td> 577K
代理商: E-1110
E-1110 Core Functional Description
2-19
E1110_RXD[9], E1110_CRS, and E1110_COL signals are demultiplexed
and mapped onto the E-110 MII_RXD[3:0], MII_RXDV, MII_RXER,
MII_CRS, and MII_COL pins, respectively. In addition to the multiplexing
and demultiplexing of the signals, the PHY Mux also maintains the same
timing relationship for all incoming and outgoing MII signals when
operating in the MII mode.
2.1.5.2 GMII Mode
The GMII mode is used when the Gigabit MAC needs to communicate
with an external GMII-compatible PHY. Figure 2.2 is a diagram of the
signal ow through the PHY multiplexer when it is operating in the GMII
mode.
When operating at 1000 Mbits/s, the Gigabit MAC always operates in the
GMII mode regardless of the PHY interface mode (GMII/TBI)
However, when congured in the GMII mode, the E1110_TXD,
E1110_RXD, E1110_PHY_TXCLK, and E1110_PHY_RXCLK signals are
mapped to the Gigabit MAC GMII signals as shown in Figure 2.3.
Figure 2.3
PHY Multiplexer Signal Mapping in GMII Mode
The PHY module maintains the timing relationship of all incoming and
outgoing signals such that GMII specications are met.
GMII_TXD[3:0]
GMII_TXEN
GMII_TXER
GMII_RXCLK
GMII_RXD[7:0]
GMII_RXDV
GMII_RXER
GMII_COL
GMII_CRS
E1110_TXD[7:0]
E1110_TXD[8]
E1110_TXD[9]
E1110_PHY_RXCLK
E1110_RXD[7:0]
E1110_RXD[9]
E1110_COL
E1110_CRS
E1110_RXD[8]
To
Gigabit
To
PHY
GMII_TXCLK
MAC
E1110_PHY_TXCLK
PHY Mux
(GMII Mode)
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