AC206-DS02-R datasheet(25/70 Pages) BOARDCOM

25 / 70 page

Preliminary Data Sheet

AC206

07/08/02

B roa dcom

Document

AC206-DS05-405-R

Pin Descriptions

Page 13

Table 5: Media Independent Interface Pins

Pin Name

Pin #

Type

Description

MII_TXD3

MII_TXD2

MII_TXD1

MII_TXD0

I,D

MII Transmit Data. The MAC sources MII_TXD[3:0] synchronous

with MII_TXCLK when MII_TXEN is asserted.

MII_TXCLK

O,D,S

MII Transmit Clock. Continuous (25 MHz/2.5 MHz) clock output

used by MAC to synchronize MII_TXEN, MII_TXD[3:0], and

MII_TXER.

MII_TXEN

I,D

MII Transmit Enable. Indicates MAC has presented valid data on

the MII_TXD[3:0].

MII_RXD3/MII_SPDSEL

MII_RXD2/MODE3

MII_RXD1/TP125

MII_RXD0

I/O,U

I/O,D

I/O,U

O,U

MII Receive Data. The PHY sources MII_RXD[3:0] synchronous

with MII_RXCLK when MII_RXDV is asserted.

After power on, the MII_SPDSEL is latched for port speed

selection. 1=100 Mb, 0=10 Mb

MII_RXCLK

O,D,S

MII Transmit Clock. Continuous (25 MHz/2.5 MHz) clock output

used by MAC to synchronize MII_RXDV, MII_RXD[3:0], and

MII_RXER.

MII_RXDV

O,D

MII Receive Data-Valid. PHY has presented valid recovered on

the MII_RXD[3:0].

MII_CRS

O,D

MII Carrier Sense. Active when carrier has been sensed.

MII_RXER

O,D

MII Receive Error. Indicates Phy has received invalid symbol

data.

MII_COL

O,D

MII Collision Detection. Active when collision is detected.

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