AC101L-DS03-R datasheet(39/54 Pages) BOARDCOM

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Preliminary Data Sheet

AC101L

8/9/04

B roa dcom Co rpo rat ion

Document

AC101L-DS06-R

Management Data Interface timing

Page 29

MANAGEMENT DATA INTERFACE TIMING

Figure 4: Management Interface Timing

100BASE-TX/FX MII TRANSMIT SYSTEM TIMING

Table 37: Management Interface Timing

Parameter

Symbol

Min

Typ

Max

Units

MDC cycle time

MDC_CYCLE

–

MDC high/low

–

MDC rise/fall time

MDC_RISE

MDC_FALL

–

MDIO input setup time to MDC rising

MDIO_SETUP

–

MDIO input hold time from MDC rising

MDIO_HOLD

–

MDIO output delay from MDC rising

MDIO_DELAY

–

Table 38: 100BASE-X MII Transmit System Timing

Parameter

Symbol

Conditions

Min

Typ

Max

Units

TX_CLK period

tCK

–

39.998

40.000

40.002

TX_CLK high period

tCKH

–

18.000

20.000

22.000

TX_CLK low period

tCKL

–

18.000

20.000

22.000

TXEN to /J/

tTJ

–

140

TXEN sampled to CRS

tCSA

RPTR is logic low

–

140

TXEN sampled to COL

tCLA

RPTR is logic low

–

140

!TXEN to /T/

tTT

–

140

!TXEN sampled to !CRS

tCSD

RPTR is logic low

–

140

!TXEN sampled to !COL

tCLD

RPTR is logic low

–

140

TX propagation delay

tTJ

From TXD[3:0] to TXOP/N(FXTP/N)

–

140

MDIO (From AC101L)

MDC

MDC_FALL

MDIO_HOLD

MDIO_SETUP

MDC_RISE

MDC_CYCLE

MDIO_SETUP

MDIO_HOLD

MDIO_DELAY

MDIO (Into AC101L

)

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