88e3015 Marvell Semiconductor, Inc., 88e3015 Datasheet - Page 13

• Manufacturer Part Number: 88e3015
• Description: Integrated 10/100 Fast Ethernet Transceiver
• Manufacturer: Marvell Semiconductor, Inc.

Table 3:
Copyright © 2006 Marvell
October 26, 2006, Advance
88E30 15
52
54
53
51
50
55
45
47
46
43
42
41
17
MII Interface
88E3 018
60
62
61
59
58
63
53
55
54
51
50
49
19
TX_CTRL/TX_EN
RX_ER
Pin Name
TX_CLK
TXD[3]
TXD[2]
TXD[1]
TXD[0]
RX_CLK
RXD[3]
RXD[2]
RXD[1]
RXD[0]
RX_CTRL/RX_DV
Document Classification: Proprietary Information
CONFIDENTIAL
Type
I/O, Z
I
O, Z
O, Z
I/O, Z
De scrip tio n
and 2.5 MHz clock reference for TX_CTRL,
TX_ER, and TXD[3:0], depending on the speed.
TX_CLK is an output when in normal MII mode,
and is an input in source synchronous MII mode.
MII Transmit Data. TXD[3:0] presents the data nib-
ble to be transmitted onto the cable.
TXD[3:0] is synchronous to TX_CLK.
used as TX_EN. When TX_CTRL is asserted, data
on TXD[3:0] along with TX_ER is encoded and
transmitted onto the cable.
TX_EN is synchronous to TX_CLK.
and 2.5 MHz clock reference for RX_CTRL,
RX_ER, and RXD[3:0] depending on the speed.
MII Receive Data. Symbols received on the cable
are decoded and presented on RXD[3:0].
RXD[3:0] is synchronous to RX_CLK.
MII Receive Data Valid. Data received on the cable
is decoded and presented on RXD[3:0] and
RX_ER. In MII mode, RX_CTRL is used as
RX_DV.
RX_CTRL is synchronous to RX_CLK.
MII Receive Error. When RX_ER and RX_CTRL
are both asserted, the signals indicate an error
symbol is detected on the cable.
When RX_ER is asserted with RX_CTRL de-
asserted, a false carrier is detected on the cable.
RX_ER is synchronous to RX_CLK.
MII Transmit Clock. TX_CLK provides a 25 MHz
MII Transmit Enable. In MII mode, TX_CTRL is
MII Receive Clock. RX_CLK provides a 25 MHz
Doc. No. MV-S103657-00, Rev. C
Pin Description
Page 13