KS8001L データシートの表示（PDF） - Micrel

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KS8001L

1.8V, 3.3V 10/100BASE-T/TX/FX Physical Layer Transceiver

Micrel 

Micrel

KSZ8001

As far as the PHY is concerned, TXD7-0 are used to convey only packet data. To allow for a direct MAC-to-MAC connection, the

MAC uses TXD7-0 to signal ‘status’ in between frames.

TX_ER

x

TX_EN

0

x

1

TXD7 – 0 Encoding

TXD0

Use to force

an error in a

direct MAC to

MAC

connection

TXD1

1

100MBit

TXD2

1

Full Duplex

TXD3

1

Link Up

TXD4

0

No Jabber

TXD7-5

1

One Data Byte (Two MII Data Nibbles)

Collision Detection

Collisions occur when CRS and TX_EN are simultaneously asserted. For this to work, the PHY must ensure that CRS is not affected

by its transmit path.

DC Specification

Parameter

Symbol

Min

Input High Voltage

Vih

2.0

Input Low Voltage

Vil

Input High Current

Iih

-10

Input Low Current

Iil

-10

Max

Units

Volts

0.8

Volts

10

uA

10

uA

June 2009

Revision 1.04

19

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