82551IT Datasheet, PDF (92/102 Pages) Intel Corporation – Fast Ethernet PCI Controller

82551IT — Networking Silicon
11.4.2.4 EEPROM Interface Timings
The 82551IT is designed to support a standard64x16 or 256x16 serial EEPROM. Table 60 provides
the timing parameters for the EEPROM interface signals. The timing parameters are shown in
Figure 25.
Table 60. EEPROM Timing Parameters
Symbol
Parameter
T51 t_ECSS
Delay from EECS High to EESK High
T52 t_ECSH
Delay from EESK Low to EECS Low
T53 t_EDIS
Setup Time of EEDI to EESK
T54 t_EDIH
Hold Time of EEDI after EESK
T55 t_ECS
EECS Low Time
Min Max Units
Notes
300
ns
EEPROM tcss
= 50 ns
30
ns
EEPROM tcsh
= 0 ns
300
ns
EEPROM tdis
= 150 ns
300
ns
EEPROM tdih
= 150 ms
750
ns
EEPROM tcs =
250 ns
Figure 25. EEPROM Timings
EECS
T51
T52
FLA15EESK
T53
T54
FLA13EEDI
86
Datasheet