82555 — Networking Silicon

46 Datasheet

11.4.2 MII Timing Parameters

Figure 14. MII Clocks AC Timing

T1,T2,T3

1.5V

T4,T5,T6 T4,T5,T6

Symbol Parameter Conditions Min Typ Max Units
T7 TTXDV TXD[3:0], TXEN, TXERR setup
from the rising edge of TXC 15 25 ns
T8 TTXH TXD[3:0], TXEN, TXERR hold
time after the rising edge of TXC 0ns
T9 TRXSU RXD[3:0], RXDV, RXERR valid
before the rising edge of RXC 10 ns
T10 TRXH RXD[3:0], RXDV, RXERR hold
time after the rising edge of RXC 10 ns
T11 TMSU MDIO setup time to the rising
edge of MDC MDIO input 10 ns
T12 TMH MDIO hold time from the rising
edge of MDC MDIO input 10 ns
T13 TMV MDIO valid from the rising edge
of MDC MDIO output 300 ns

Figure 15. MII Transmit Timing Parameters

T7
T8
TXCLK
TXD[3:0],
TXER,TXEN Data InvalidData Invalid Data Valid