27/29

STE100P

Figure 12: 10Base-T Transmit Timing

Parameter

Sym

Min

Typ

Max

Units

TXD, TX_EN, TX_ER Setup to TX_CLK High

t8A

10

-

-

ns

TXD, TX_EN, TX_ER Hold from TX_CLK High

t8B

5

-

-

ns

TX_EN sampled to CRS asserted

t8C

-

0

4

BT

TX_EN sampled to CRS de-asserted

t8D

-

8

BT

TX_EN sampled to TXP out (Tx latency)

t8E

-

3-5

BT

BT is the duration of one bit as transferred to and from the MAC and is the reciprocal of the bit rate.

TXP