82544EI Datasheet, PDF (33/52 Pages) Intel Corporation – Gigabit Ethernet Controller

82544EI Gigabit Ethernet Controller Networking Silicon Datasheet
4.5.2.3
Link Interface Receive Interface Timing
Figure 13. Receive Interface Timing
RBC1
2.0V
RX_DATA[9:0]
0.8V
2.0V
COM_DET
0.8V
RBC0
TSU
TH
COMMA
Code_Group
TA-B
1.4V
Valid
Data
TSU
TH
1.4V
Table 17. Receive Interface Receive Timing
Symbol
T_FREQ
T_SETUP
T_HOLD
T_DUTY
T_A-B
Parameter
RBC0/RBC1 Frequency
TBI Mode (1000Mb/s)
Data Setup before Rising RBC0 / RBC1
Data Hold after Rising RBC0 / RBC1
RBC0 / RBC1 Duty Cycle
RBC0 / RBC1 Skew
Min
Typ
Max
Units
62.5
MHz
2.5
ns
1
ns
40
60
%
7.5
8.5
ns
Datasheet
29