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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)： | 84/108頁 |
| 文件大?。?/td> | 577K |
| 代理商： | E-1110 |
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E-110 Core Interface Signals
3-39
is deasserted, the MII_RXD[3:0] signals have no effect on
the E-110 MAC.
For a frame to be correctly interpreted by the E-110 MAC,
a completely formed SFD must be passed across the
interface. A completely formed SFD is the octet
0b1010.1011, which follows seven identical octets of
preamble (0b1010.1010).
MII_RXDV
MII Receive Data Valid
Output
The E-1110 asserts the MII_MRXDV signal to indicate
that the E-1110 is presenting recovered and decoded
nibbles on the MII_RXD[3:0] signals and that MII_RCLK
is synchronous to the recovered data. The E-1110
asserts MII_RXDV synchronously on the rising edge of
MII_RCLK. The E-1110 keeps MII_RXDV asserted from
the rst recovered nibble of the frame through the nal
recovered nibble and deasserts it prior to the rst
MII_RCLK that follows the nal nibble. MII_RXDV
encompasses the frame, starting no later than the SFD
and excluding any end of frame delimiter. The E-1110
may also assert MII_RXDV for transferring a validly
decoded preamble.
MII_RXER
MII Receive Error
Output
The E-1110 asserts the MII_RXER signal to indicate to
the E-110 MAC that a media error (for example, a coding
error) was detected somewhere in the frame presently
being transferred from the E-1110 to the E-110 MAC. The
E-1110 asserts MII_RXER synchronously on the rising
edge of MII_RCLK for one or more MII_RCLK periods
and then deasserts it. The E-1110 asserts MII_RXER for
at least one MII_RCLK clock period during the frame.
MII_RCLK
MII Receive Clock.
Output
The MII_RCLK signal is a continuous clock that provides
a timing reference for transfer of the MII_RXDV,
MII_RXD[3:0], and MII_RXER signals from the E-1110 to
the E-110 MAC.
MII_RCLK is also driven during test scan mode from the
E1110_PHY_RCLK signal.
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