LAN8710A Datasheet, PDF (73/82 Pages) SMSC Corporation – Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR Technology

5.5.4
Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR^® Technology
Datasheet
MII Interface Timing
This section specifies the MII interface transmit and receive timing. Please refer to Section 3.4.1, "MII,"
on page 30 for additional details.
RXCLK
RXD[3:0]
RXDV
t_clkp
t_clkh t_clkl
t_val
t_val
t_hold
Figure 5.4 MII Receive Timing
t_hold
t_val
Table 5.8 MII Receive Timing Values
SYMBOL
DESCRIPTION
MIN
t_clkp
RXCLK period
Note 5.15
t_clkh
RXCLK high time
t_clkp*0.4
t_clkl
RXCLK low time
t_clkp*0.4
t_val
RXD[3:0], RXDV output valid from rising edge of
RXCLK
t_hold
RXD[3:0], RXDV output hold from rising edge of
10.0
RXCLK
MAX
t_clkp*0.6
t_clkp*0.6
28.0
UNITS NOTES
ns
ns
ns
ns
Note 5.16
ns
Note 5.16
Note 5.15 40ns for 100BASE-TX operation, 400ns for 10BASE-T operation.
Note 5.16 Timing was designed for system load between 10 pf and 25 pf.
SMSC LAN8710A/LAN8710Ai
73
DATASHEET
Revision 1.4 (08-23-12)