Data Sheet

Electrical/Mechanical Specification—Ethernet Controller I210
795
11.6.2.5 NC-SI AC Specification
The I210 is designed to support the standard DMTF NC-SI interface. For NC-SI I/F timing specification
see Table 11-12 and Figure 11-5.
Figure 11-4. Flash Timing Diagram
Table 11-12.
NC-SI AC Specifications
Symbol Parameter Min Typ Max Units Notes
Tckf NC_SI_CLK_IN Frequency 50 MHz 2
Rdc NC_SI_CLK_IN Duty Cycle 35 65 % 1
Racc NC_SI_CLK_IN accuracy 100 ppm
Tco
Clock-to-out (10 pF =< cload <=50 pF)
NC_SI_RXD[1:0], NCSI_CRS_DV and NCSI_ARB_OUT
Data valid from NC_SI_CLK_IN rising edge
2.5 12.5 ns 4
Tsu
NC_SI_TXD[1:0], NC_SI_TX_EN and NC_SI_ARB_IN
Data Setup to NCSI_CLK_IN rising edge
3ns
Thold
NC_SI_TXD[1:0], NC_SI_TX_EN Data hold from
NC_SI_CLK_IN rising edge
1ns
Tor
NC_SI_RXD[1:0], NC_SI_CRS_DV and NC_SI_ARB_OUT
Output Time rise
0.5 6 ns 3
Tof
NC_SI_RXD[1:0], NC_SI_CRS_DV and NC_SI_ARB_OUT
Output Time fall
0.5 6 ns 3
Tckr/Tckf NC_SI_CLK_IN Rise/Fall Time 0.5 3.5 ns
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. This timing relates to the output pins, while Tsu and Thd relate to timing at the input pins.
5. 10 pF =< Cload <= 30 pF.