LAN8700 Datasheet, PDF (55/74 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
6.3.2.2 10M RMII Transmit Timing
FIGURE 6-9:
10M RMII TRANSMIT TIMING DIAGRAM
Clock In -
CLKIN
Data Out -
TXD[1:0]
TX_EN
T_10.1
T_10.2
Valid Data
TABLE 6-9: 10M RMII TRANSMIT TIMING VALUES
Parameter
Description
MIN TYP MAX Units
T10.1
Transmit signals required setup to 4
rising edge of CLKIN
T10.2
Transmit signals required hold after 2
rising edge of REF_CLK
CLKIN frequency
50
ns
ns
MHz
Notes
6.4 RMII CLKIN Timing
TABLE 6-10:
Parameter
RMII CLKIN (REF_CLK)TIMING VALUES
Description
MIN TYP
CLKIN frequency
CLKIN Frequency Drift
CLKIN Duty Cycle
CLKIN Jitter
50
40
MAX
± 50
60
150
Units
MHz
ppm
%
psec
Notes
p-p – not RMS
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DS00002260A-page 55