參數(shù)資料
型號(hào)： 9883
廠商： Intel Corp.
英文描述： Advanced 10/100 Umnmanaged Repeater
中文描述： 高級(jí)10/100 Umnmanaged直放站
文件頁(yè)數(shù)： 10/56頁(yè)
文件大小： 719K
代理商： 9883
LXT9883/9863
—
Advanced 10/100 Unmanaged Repeater
10
Datasheet
Document #: 249115
Revision #: 003
Rev. Date: 08/07/01
Table 2. MII #2 Signal Descriptions
Pin
Symbol
Type
1, 2
Description
18
MII2_SPD
I
PU
Speed Select - MII 2.
This signal is sensed at power up, hardware reset, and
software reset. Selects operating speed of the respective MII (MAC) interface.
High = 100 Mbps. Low = 10 Mbps.
205
206
207
208
MII2_RXD0
MII2_RXD1
MII2_RXD2
MII2_RXD3
O
Receive Data - MII 2.
The LXT98x3 transmits received data to the controller on these
outputs. Data is driven on the falling edge of MII2_RXCLK.
204
MII2_RXDV
O
Receive Data Valid - MII 2.
Active High signal, synchronous to MII2_RXCLK,
indicates valid data on MII2_RXD<3:0>.
203
MII2_RXCLK
O
Receive Clock - MII 2.
MII receive clock for expansion port. This is a 2.5 or 25 MHz
clock derived from the CLK25 input (refer to
Table 7 on page 16
).
202
MII2_RXER
O
Receive Error - MII 2.
Active High signal, synchronous to MII2_RXCLK, indicates
invalid data on MII2_RXD<3:0>.
197
MII2_TXER
I
Transmit Error - MII 2.
MII2_TXER is a 100M-only signal. The MAC asserts this
input when errors occurs in the transmit data stream. The LXT98x3 sends
‘
Invalid
Code Symbols
’
on the line.
196
MII2_TXCLK
O
Transmit Clock - MII 2.
This is a 2.5 or 25 MHz clock derived from the CLK25 input
(refer to
Table 7 on page 16
).
195
MII2_TXEN
I
Transmit Enable - MII 2.
External controllers drive this input High to indicate data is
transmitted on the MII2_TXD<3:0> pins. Ground this input if unused.
194
193
192
191
MII2_TXD0
MII2_TXD1
MII2_TXD2
MII2_TXD3
I
Transmit Data - MII 2.
External controllers use these inputs to transmit data to the
LXT98x3. The LXT98x3 samples MII2_TXD<3:0> on the rising edge of MII2_TXCLK,
when MII2_TXEN is High.
188
MII2_COL
O
Collision - MII 2.
The LXT98x3 drives this signal High to indicate a collision
occurred.
187
MII2_CRS
O
Carrier Sense - MII 2.
Active High signal indicates LXT98x3 is transmitting or
receiving.
1. I = Input, O = Output, I/O = Input/Output, D = Digital, A = Analog, AI = Analog Input, A I/O = Analog Input/Output, OD = Open
Drain,
OS = Open Source, PD = Pull Down, PU = Pull Up.
NC = No Clamp. Pad does not clamp input in the absence of power.
2. Pins are 5V tolerant, unless indicated.
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