lan9420 Standard Microsystems Corp., lan9420 Datasheet - Page 166

• Manufacturer Part Number: lan9420
• Description: Lan9420/lan9420i Single-chip Ethernet Controller With Hp Auto-mdix Support And Pci Interface
• Manufacturer: Standard Microsystems Corp.

Revision 1.1 (03-31-08)
5.8
SYMBOL
EEDI (VERIFY)
t
t
t
t
t
t
t
cshckh
t
t
t
ckhdis
dvckh
dsckh
dhckh
cshdv
cklcsl
ckldis
ckcyc
dhcsl
t
t
t
ckh
ckl
csl
EEPROM Timing
EECLK
EEDO
The following specifies the EEPROM timing requirements for LAN9420/LAN9420i:
EECS
EEDI
EECLK Cycle time
EECLK High time
EECLK Low time
EECS high before rising edge of EECLK
EECLK falling edge to EECS low
EEDIO valid before rising edge of EECLK
(OUTPUT)
EEDIO disable after rising edge EECLK
(OUTPUT)
EEDIO setup to rising edge of EECLK (INPUT)
EEDIO hold after rising edge of EECLK
(INPUT)
EECLK low to data disable (OUTPUT)
EEDIO valid after EECS high (VERIFY)
EEDIO hold after EECS low (VERIFY)
EECS low
DESCRIPTION
t
cshckh
Table 5.12 EEPROM Timing Values
t
cshdv
Figure 5.4 EEPROM Timing
t
ckh
t
Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
t
dsckh
ckcyc
DATASHEET
t
dvckh
t
ckl
166
t
ckhdis
t
dhckh
1070
1070
1110
MIN
550
550
550
550
580
30
90
0
0
t
ckldis
TYP
t
cklcsl
t
dhcsl
SMSC LAN9420/LAN9420i
t
csl
MAX
1130
570
570
600
Datasheet
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns