Cirrus Logic CS8952 - Manual (Page 10)

CS8952
CrystalLAN™ 100BASE-X and 10BASE-T Transceiver 10
DS206F1
100BASE-TX MII TRANSMIT TIMING - 4B/5B ALIGN MODES
Parameter Symbol Min Typ Max Unit
TXD[3:0] Setup to TX_CLK High t
SU1
10 - - ns
TX_EN Setup to TX_CLK High t
SU2
10 - - ns
TXD[3:0] Hold after TX_CLK High t
HD1
0 - - ns
TX_ER Hold after TX_CLK High t
HD2
0 - - ns
TX_EN Hold after TX_CLK High t
HD3
0 - - ns
TX_EN “high” to CRS asserted latency t
CRS1
- 8 BT
TX_EN “low” to CRS de-asserted latency t
CRS2
- 8 BT
TX_EN “high” to TX+/- output (TX Latency) t
LAT
6 7 8 BT
TX_CLK
TX_EN
TXD[3:0],
CRS
TX+/-
t
SU2
t
SU1
t
HD2
t
HD1
t
CRS1 t
CRS2
t
LAT
Input/Output
Input
Input
Output
Output
TX_ER/TXD4
Data
IN
Symbol
Out