Intel 82555 - Manual (Page 51)

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
T 9 T 1 0
RXCLK
RXD[3:0],
RXER,RXDV
Data Invalid Data Invalid D a t a V a l i d
T 1 1 T 1 2
M D C
MDIO (Input) Data Invalid Data Invalid Data Valid
T 1 3
MDIO (Output) Data Invalid Data 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
T 1 4 T 1 5
P O R T E N
RXD[3:0],
RXER,RXDV,
R X C L K
Signal Driven