Datasheet

KSZ8041TL/FTL/MLL
DS00002436B-page 26  2017 Microchip Technology Inc.
3.16.4 RECEIVE DATA AND CONTROL (RX)
RX provides receive data and control information from PHY-to-MAC in 10-bit segments.
• In 10 Mbps 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 100 Mbps mode, each segment represents a new byte of data.
The following figure and tables show the receive data/control format for each segment:
FIGURE 3-2: SMII TRANSMIT DATA/CONTROL SEGMENT
TABLE 3-5: SMII TX BIT DESCRIPTION
SMII TX Bit Description
TX_ER Transmit Error
TX_EN Transmit Enable
TXD[0:7] Encoded Data
See Table 3 - 6 .
TABLE 3-6: SMII TXD[0:7] ENCODING TABLE
TX_ER TX_EN TXD0 TXD1 TXD2 TXD3 TXD4 TXD5 TXD6 TXD7
X0Use to
force an
error in a
direct
MAC-to-
MAC con-
nection
Speed
0=10M
1=100M
Duplex
0=Half
1=Full
Link
0=Down
1=Up
Jabber
0=No
1=Yes
111
X 1 One Data Byte
TX_ER TX_EN TXD0 TXD1 TXD2 TXD3 TXD4 TXD5 TXD6 TXD7
CLOCK
SYNC
TX