AX88875AP Datasheet, PDF (8/23 Pages) ASIX Electronics Corporation – 10/100BASE 5-Port Dual Speed Bripeater Controller

AX88875AP Bripeater
2.0 Pin Description
The following terms describe the AX88875A pinout:
All pin names with the “/” suffix are asserted low.
I
=
Input
O
=
Output
I/O
=
Input /Output
2.1 MII interfaces
Signal Name
TXER[4:0]
Or
COL[4:0]
TXD[4:0][3:0]
TXEN[4:0]
RXD[4:0][3:0]
RXER[4:0]
RXCLK[4:0]
RXDV[4:0]
CRS[4:0]
COL_O[4]
Type Pin No.
Description
O
66, 44, 28 Transmit Error : When /HALF10 pin set to “high”. TXER is transition
or
9, 154 synchronously with respect to the rising edge of TXCLK . Asserted
high when a code violation is request to be send
I
Collision : When /HALF10 pin set to “low”. COL is input from PHY,
when 10Mbps PHY is in half-duplex mode.
O 65 – 62, 43 – 40 Transmit Data : TXD[3:0] is transition synchronously with respect to
27 – 24, 8 – 5 the rising edge of TXCLK. For each TXCLK period in which TXEN is
153 - 150 asserted, TXD[3:0] are accepted for transmission by the PHY.
O
61, 39, 23 Transmit Enable : TXEN is transition synchronously with respect to the
4, 149 rising edge of TXCLK. TXEN indicates that the port is presenting
nibbles on TXD [3:0] for transmission.
I 60 – 57, 37 – 34 Receive Data : RXD [3:0] is driven by the PHY synchronously with
22 – 19, 3, 2 respect to RXCLK.
160, 159,
147 - 144
I
51, 30, 15, Receive Error : RXER ,is driven by PHY and synchronous to RXCLK,
155, 140 is asserted for one or more RXCLK periods to indicate to the port that
an error has detected.
I
56, 33, Receive Clock : RX_CLK is a continuous clock that provides the
18, 158, 143 timing reference for the transfer of the RXDV,RXD [3:0] and RXER
signals from the PHY to the MII port of the repeater.
I
52, 31, Receive Data Valid : RX_DV is driven by the PHY synchronously with
16, 156, 141 respect to RXCLK. Asserted high when valid data is present on RXD
[3:0].
I
53, 32, Carrier Sense : Asynchronous signal CRS is asserted by the PHY when
17, 157, 142 receive medium is non-idle at full duplex mode.
O
67
Collision : Collision detection signal for port 4
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