lan9512 Standard Microsystems Corp., lan9512 Datasheet - Page 43

• Manufacturer Part Number: lan9512
• Description: Usb Hub With Integrated 10/100 Ethernet Controller
• Manufacturer: Standard Microsystems Corp.

USB Hub with Integrated 10/100 Ethernet Controller
Datasheet
SMSC LAN9512
4.5.3
SYMBOL
t
EEDI (VERIFY)
t
t
t
t
t
cshckh
t
t
t
t
ckhdis
dhckh
dvckh
dsckh
ckldis
cshdv
cklcsl
dhcsl
ckcyc
t
t
t
ckh
ckl
csl
EECLK
EEPROM Timing
The following specifies the EEPROM timing requirements for LAN9512:
EEDO
EECS
EEDI
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
DESCRIPTION
t
cshckh
Table 4.5 EEPROM Timing Values
t
cshdv
Figure 4.1 EEPROM Timing
t
ckh
t
t
dsckh
ckcyc
DATASHEET
t
dvckh
t
ckl
43
t
ckhdis
t
dhckh
1070
1070
1110
MIN
550
550
550
550
580
30
90
0
0
t
ckldis
TYP
t
cklcsl
t
dhcsl
t
csl
Revision 1.0 (04-20-09)
MAX
1130
570
570
600
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns