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Datasheet 47
Networking Silicon — 82555
11.4.3 Repeater Mode Timing Parameters
Figure 16. MII Receive Timing Parameters
Figure 17. MII Timing Parameters: MDC/MDIO
T9 T10
RXCLK
RXD[3:0],
RXER,RXDV
Data InvalidData Invalid Data Valid
T11 T12
MDC
MDIO (Input)
Data InvalidData Invalid Data Valid
T13
MDIO (Output)
Data InvalidData Invalid Data Valid
Symbol Parameter Conditions Min Typ Max Units
T14 T
RDRV
PORTEN assertion to RXD[3:0],
RXDV, and RXERR (RXC driven)
1.5 2.5
RXC
clocks
T15 T
RTST
PORTEN de-assertion to
RXD[3:0], RXDV, and RXERR
(RXC tri-stated)
a
a. RXC, RXDV, and RXERR are tri-stated only after they have been driven low (0).
1.5 2.5
RXC
clocks
Figure 18. PORT Enable Timing
T14
T15
PORTEN
RXD[3:0],
RXER,RXDV,
RXCLK
Si
g
nal Driven