KSZ8001SLI Micrel Semiconductor, Inc., KSZ8001SLI Datasheet - Page 19

• Manufacturer Part Number: KSZ8001SLI
• Description: 1.8V, 3.3V 10/100BASE-T/TX/F Physical Layer Transceiver
• Manufacturer: Micrel Semiconductor, Inc.

March 2006
Micrel
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.
TXD7 – 0 Encoding
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
Input High Voltage
Input High Current
Input Low Voltage
Input Low Current
TX_ER
x
x
Parameter
TX_EN
0
1
direct MAC to
Use to force
an error in a
Symbol
connection
Vih
TXD0
Vil
Iih
MAC
Iil
100MBit
TXD1
1
One Data Byte (Two MII Data Nibbles)
Min
19
-10
-10
2.0
Full Duplex
TXD2
1
Link Up
TXD3
1
Max
0.8
10
10
No Jabber
TXD4
0
Units
Volts
Volts
Revision 1.03
uA
uA
TXD7-5
KSZ8001
1