LAN8700 Datasheet, PDF (54/74 Pages) SMSC Corporation – ±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR TM in a Small Footprint

LAN8700/LAN8700i
6.3.1.2 100M RMII Transmit Timing
FIGURE 6-7:
100M RMII TRANSMIT TIMING DIAGRAM
Clock In -
CLKIN
Data Out -
TXD[1:0]
TX_EN
T_8.1 T_8.2
Valid Data
TABLE 6-7:
Parameter
T8.1
T8.2
100M RMII TRANSMIT TIMING VALUES
Description
MIN TYP
Transmit signals required setup to
2
rising edge of CLKIN
Transmit signals required hold after 1.5
rising edge of REF_CLK
CLKIN frequency
50
MAX
Units
ns
ns
MHz
6.3.2
6.3.2.1
RMII 10BASE-T TX/RX TIMINGS
10M RMII Receive Timing
FIGURE 6-8:
10M RMII RECEIVE TIMING DIAGRAM
Notes
Clock In -
CLKIN
Data Out -
RXD[1:0]
CRS_DV
T_9.1
Valid Data
TABLE 6-8: 10M RMII RECEIVE TIMING VALUES
Parameter
Description
MIN TYP MAX Units
T9.1
Output delay from rising edge of
2
CLKIN to receive signals output
valid
10
ns
CLKIN frequency
50
MHz
Notes
DS00002260A-page 54
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