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LXT9883 Datasheet(PDF) 10 Page - Intel Corporation |
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LXT9883 Datasheet(HTML) 10 Page - Intel Corporation |
10 / 56 page 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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