Cirrus-logic CS8952 Manual do Utilizador descarregar pdf (Página 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

-8BT

TX_EN “low” to CRS de-asserted latency t

CRS2

-8BT

TX_EN “high” to TX+/- output (TX Latency) t

LAT

678BT

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

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 80 81

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