Intel 82555 - Manual (Page 54)

82555 — Networking Silicon
50 Datasheet
11.4.8 10BASE-T Normal Link Pulse (NLP) Timing Parameters
11.4.9 Auto-Negotiation Fast Link Pulse (FLP) Timing Parameters
T26a T
R_CRSL
End of receive frame to falling
edge of CRS
10 Mbps 4.5 bits
T27 T
R_RXDVL
End of receive frame to falling
edge of RXDV
100 Mbps 12 bits
T27a T
R_RXDVL
End of receive frame to falling
edge of RXDV
10 Mbps 4 bits
Symbol Parameter Conditions Min Typ Max Units
Figure 22. Receive Packet Timing Parameters
R X D V
C R S
Valid Frame Data
R X C L K
Frame On link
T25,T25a
T24,T24a
T26,T26a
T27,T27a
Symbol Parameter Conditions Min Typ Max Units
T28 T
NLP_WID
NLP width 10 Mbps 100 ns
T29 T
NLP_PER
NLP period 10 Mbps 8 24 ms
Figure 23. Normal Link Pulse Timing Parameters
N o r m a l L i n k P u l s e
T 2 9
T 2 8
Symbol Parameter Conditions Min Typ Max Units
T30 T
FLP_WID
FLP width (clock/data) 100 ns
T31 T
FLP_CLK_CLK
Clock pulse to clock pulse period 111 125 139
µ
s
T32 T
FLP_CLK_DAT
Clock pulse to data pulse period 55.5 62.5 69.5
µ
s