LAN8810I-AKZE Datasheet, PDF (93/100 Pages) Microchip Technology – GMII 10/100/1000 Ethernet Transceiver with HP Auto-MDIX Support

5.5.6
GMII 10/100/1000 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
MII Timing (100BASE-TX, 10BASE-T)
This section specifies the MII interface transmit and receive timing. Please refer to Section 3.3, "GMII
Interface," on page 24 for additional details.
RXCLK
RXD[3:0]
RXDV
t_clkp
t_clkh t_clkl
t_val
t_val
t_hold
Figure 5.7 MII Receive Timing
t_hold
t_val
Table 5.16 MII Receive Timing Values
SYMBOL
t_clkp
t_clkh
t_clkl
t_val
t_hold
DESCRIPTION
RXCLK period
RXCLK high time
RXCLK low time
RXD[3:0], RXDV output valid from rising edge of
RXCLK
RXD[3:0], RXDV output hold from rising edge of
RXCLK
MIN
Note 5.23
t_clkp*0.4
t_clkp*0.4
10.0
MAX
t_clkp*0.6
t_clkp*0.6
28.0
UNITS
ns
ns
ns
ns
NOTES
Note 5.24
ns
Note 5.24
Note 5.23 40ns for 100BASE-TX operation, 400ns for 10BASE-T operation.
Note 5.24 Timing was designed for system load between 10 pf and 25 pf.
SMSC LAN8810/LAN8810i
93
DATASHEET
Revision 1.0 (02-06-13)