ksz8041tl-ftl Micrel Semiconductor, ksz8041tl-ftl Datasheet - Page 25

• Manufacturer Part Number: ksz8041tl-ftl
• Description: 10base-t/100base-tx/100base-fx Physical Layer Transceiver
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
The following figure and table shows the transmit data/control format for each segment:
Receive Data and Control (RX)
RX provides receive data and control information from PHY-to-MAC in 10-bit segments.
April 2007
•
•
TX_ER
X
X
CLOCK
In 10Mbps mode, each segment is repeated ten times. Therefore, every ten segments represent a new byte of
data. The MAC can sample any one of every ten segments.
In 100Mbps mode, each segment represents a new byte of data.
SYNC
TX
TX_EN
0
1
TX_ER
TXD0
Use to
force an
error in a
direct
MAC-to-
MAC
connection
One Data Byte
SMII TX Bit
TX_ER
TX_EN
TXD[0:7]
TX_EN
Figure 2. SMII Transmit Data/Control Segment
TXD0
TXD1
Speed
0=10M
1=100M
Table 6. SMII TXD[0:7] Encoding Table
Table 5. SMII TX Bit Description
TXD1
Description
Transmit Error
Transmit Enable
Encoded Data
See SMII TXD[0:7] Encoding Table (below)
TXD2
Duplex
0=Half
1=Full
TXD2
25
TXD3
Link
0=Down
1=Up
TXD3
TXD4
Jabber
0=No
1=Yes
TXD4
TXD5
TXD5
1
TXD6
TXD6
1
TXD7
M9999-042707-1.1
KSZ8041TL/FTL
TXD7
1