Datasheet

LAN8700/LAN8700i
DS00002260A-page 54  2007-2016 Microchip Technology Inc.
6.3.1.2 100M RMII Transmit Timing
6.3.2 RMII 10BASE-T TX/RX TIMINGS
6.3.2.1 10M RMII Receive Timing
FIGURE 6-7: 100M RMII TRANSMIT TIMING DIAGRAM
TABLE 6-7: 100M RMII TRANSMIT TIMING VALUES
Parameter Description MIN TYP MAX Units Notes
T8.1 Transmit signals required setup to
rising edge of CLKIN
2ns
T8.2 Transmit signals required hold after
rising edge of REF_CLK
1.5 ns
CLKIN frequency 50 MHz
FIGURE 6-8: 10M RMII RECEIVE TIMING DIAGRAM
TABLE 6-8: 10M RMII RECEIVE TIMING VALUES
Parameter Description MIN TYP MAX Units Notes
T9.1 Output delay from rising edge of
CLKIN to receive signals output
valid
210ns
CLKIN frequency 50 MHz
Clock In -
CLKIN
Data Out -
TXD[1:0]
T
8.1
TX_EN
T
8.2
Valid Data
Clock In -
CLKIN
Data Out -
RXD[1:0]
CRS_DV
Valid Data
T
9.1