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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720/LAN8720i 61 Revision 1.0 (05-28-09)
DATASHEET
6.3.1.2 100M RMII Transmit Timing (50MHz REF_CLK OUT)
Figure 6.7 100M RMII Transmit Timing Diagram (50MHz REF_CLK OUT)
Table 6.7 100M RMII Transmit Timing Values (50MHz REF_CLK OUT)
PARAMETER DESCRIPTION MIN TYP MAX UNITS NOTES
T12.1 Transmit signals required setup to
rising edge of REFCLKO
7ns
T12.2 Transmit signals required hold
after rising edge of REFCLKO
2.5 ns
REFCLKO frequency 50 MHz
REFCLKO
Data In -
TXD[1:0]
T
12.1
TX_EN
T
12.2
Valid Data