LAN9514_12 Datasheet, PDF (47/52 Pages) SMSC Corporation – USB 2.0 Hub and 10/100 Ethernet Controller

USB 2.0 Hub and 10/100 Ethernet Controller
Datasheet
4.5.3
EEPROM Timing
The following specifies the EEPROM timing requirements for LAN9514/LAN9514i:
EECS
EECLK
t_cshckh
t_ckcyc
t_ckh t_ckl
EEDO
EEDI
EEDI (VERIFY)
t_dvckh t_ckhdis
t_dsckh
t_dhckh
t_cshdv
Figure 4.2 EEPROM Timing
Table 4.8 EEPROM Timing Values
SYMBOL
t_ckcyc
t_ckh
t_ckl
t_cshckh
t_cklcsl
t_dvckh
t_ckhdis
t_dsckh
t_dhckh
t_ckldis
t_cshdv
t_dhcsl
t_csl
DESCRIPTION
EECLK Cycle time
EECLK High time
EECLK Low time
EECS high before rising edge of EECLK
EECLK falling edge to EECS low
EEDO valid before rising edge of EECLK
EEDO disable after rising edge EECLK
EEDI setup to rising edge of EECLK
EEDI hold after rising edge of EECLK
EECLK low to data disable (OUTPUT)
EEDIO valid after EECS high (VERIFY)
EEDIO hold after EECS low (VERIFY)
EECS low
MIN
1110
550
550
1070
30
550
550
90
0
580
0
1070
t_csl
t_cklcsl
t_ckldis
t_dhcsl
TYP
MAX
UNITS
1130
ns
570
ns
570
ns
ns
ns
ns
ns
ns
ns
ns
600
ns
ns
ns
SMSC LAN9514/LAN9514i
47
DATASHEET
Revision 1.2 (02-29-12)