Datasheet 49

Networking Silicon — 82555
11.4.6 Jabber Timing Parameters 11.4.7 Receive Packet Timing Parameters

Figure 20. Squelch Test Timing Parameters

TXEN
COL
TXCLK
T20 T21
Symbol Parameter Conditions Min Typ Max Units
T22 TJAB_ON
Jabber turn-on delay (TXEN
asserted to end of transmit
frame) 10 Mbps 26 ms
T23 TJAB_OFF Jabber turn-off delay (TXEN de-
asserted to falling edge of COL) 10 Mbps 410 ms

Figure 21. Jabber Timing Parameters

TXEN
COL

TDP/TDN

T22
T23
Symbol Parameter Conditions Min Typ Max Units
T24 TR_CRSH Start of receive frame to rising
edge of CRS 100 Mbps 11 13 bits
T24a TR_CRSH Start of receive frame to rising
edge of CRS 10 Mbps 3 5 bits
T25 TR_RXDVH Start of receive frame to rising
edge of RXDV 100 Mbps 15 bits
T25a TR_RXDVH Start of receive frame to rising
edge of RXDV 10 Mbps 22 bits
T26 TR_CRSL End of receive frame to falling
edge of CRS 100 Mbps 14 16 bits