82551QM Datasheet, PDF (106/120 Pages) Intel Corporation – Fast Ethernet Multifunction PCI/CardBus Controller

82551QM — Networking Silicon
12.4.2.4 EEPROM Interface Timings
The 82551QM is designed to support a standard 64x16 or 256x16 serial EEPROM. Table 79
provides the timing parameters for the EEPROM interface signals. The timing parameters are
illustrated in Figure 28.
Table 79. 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 28. EEPROM Timings
EECS
T51
T52
FLA15/EESK
T53
T54
FLA13/EEDI
100
Datasheet