Datasheet

 2007-2016 Microchip Technology Inc. DS00002260A-page 55
LAN8700/LAN8700i
6.3.2.2 10M RMII Transmit Timing
6.4 RMII CLKIN Timing
FIGURE 6-9: 10M RMII TRANSMIT TIMING DIAGRAM
TABLE 6-9: 10M RMII TRANSMIT TIMING VALUES
Parameter Description MIN TYP MAX Units Notes
T10.1 Transmit signals required setup to
rising edge of CLKIN
4ns
T10.2 Transmit signals required hold after
rising edge of REF_CLK
2ns
CLKIN frequency 50 MHz
TABLE 6-10: RMII CLKIN (REF_CLK)TIMING VALUES
Parameter Description MIN TYP MAX Units Notes
CLKIN frequency 50 MHz
CLKIN Frequency Drift ± 50 ppm
CLKIN Duty Cycle 40 60 %
CLKIN Jitter 150 psec p-p – not RMS
Clock In -
CLKIN
Data Out -
TXD[1:0]
T
10.1
TX_EN
T
10.2
Valid Data