82575EB Datasheet, PDF (52/62 Pages) Intel Corporation – Intel® 82575EB Gigabit Ethernet Controller Datasheet

Intel^® 82575EB Gigabit Ethernet Controller — NC-SI Interface
6.4.3 NC-SI Interface
Table 16.
NC-SI AC Specification
Symbol
Parameter
Min
Typ
Max
Units
Notes
REF_CLK Frequency
50
MHz
2
REF_CLK Duty Cycle
35
65
%
1
REF_CLK accuracy
100
ppm
Tsu
TXD[1:0], TX_EN, Data Setup to REF_CLK rising
3
ns
edge
Thold
TXD[1:0], TX_EN Data hold from REF_CLK rising
1.5
edge
ns
6
Tval
RXD[1:0], CRS_DV Data valid from REF_CLK
1.8
rising edge
9
ns
Tor
RXD[1:0], CRS_DV Output Time rise
0.5
6
ns
3
Tof
Todr1
Todf1
Tidr2
Tidf2
Tir
RXD[1:0], CRS_DV Output Time fall
RXD[1:0], CRS_DV Output delay rise
RXD[1:0], CRS_DV Output delay fall
TXD[1:0], TX_EN Input delay rise
TXD[1:0], TX_EN Input delay fall
TXD[1:0], TX_EN Input Time rise
0.5
2
2
0.5
0.5
0.02
6
ns
3
5.8
ns
3
5.8
ns
3
6
ns
4, 5
6
ns
4, 5
0.15
ns
4, 5
Tif
TXD[1:0], TX_EN Input Time fall
0.02
0.15
ns
4, 5
Notes:
1. Clock Duty cycle measurement: High interval measured from Vih to Vil points, Low from Vil to next Vih
2. Clock interval measurement from Vih to Vih
3. Cload = 25 pF
4. Cload = 200 fF
5. The input delay test conditions: Maximum input level = VIN = 2.7V; Input rise/fall time (0.2VIN to 0.8VIN) = 1ns (Slew Rate ~
1.5ns).
6. The NC-SI specification defines a hold time of 1.0 ns. In order to work with the 82575, the board designer should guarantee a hold
time of 1.5 ns.
Intel^® 82575EB Gigabit Ethernet Controller
Datasheet
52
317679-004
Revision: 2.11
January 2011