Fast Ethernet 10/100 Quad Transceivers — LXT974/LXT975
Figure 28. MII - 100BASE-FX Receive Timing
0ns
250ns
FIBIP
t6
t7
CRS
TRSTE1
t4
RX_DV
t1
t2
RXD<3:0>
RX_CLK
t8
t9
COL
Table 33. MII - 100BASE-FX Receive Timing Parameters
1
Parameter
Sym
Min
Typ
Max
Units
RXD, RX_DV, RX_ER setup to RX_CLK High
RXD, RX_DV, RX_ER hold from RX_CLK High
CRS asserted to RXD<3:0>, RX_DV asserted
Receive start of “J” to CRS asserted
t1
t2
t4
t6
t7
t8
t9
10
5
–
–
8
–
–
ns
ns
–
–
BT
BT
BT
BT
BT
0
13 - 17
21 - 25
13 - 17
21 - 25
20
26
20
26
Receive start of “T” to CRS de-asserted
Receive start of “J” to COL asserted
13
0
Receive start of “T” to COL de-asserted
13
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
Datasheet
55