lan9500 Standard Microsystems Corp., lan9500 Datasheet - Page 30

• Manufacturer Part Number: lan9500
• Description: Lan9500/lan9500i Hi-speed Usb 2.0 To 10/100 Ethernet Controller
• Manufacturer: Standard Microsystems Corp.

Revision 1.4 (07-07-08)
3.5.5
SYMBOL
t
t
outdly
txhold
TXD[3:0]
Turbo MII Interface Timing
The external MII supports Turbo MII and the interface timing is as follows.
Note 3.12 These values satisfy the MII specification requirement of 0 ns to 25 ns clock to output
Note 3.13 Timing was designed for system load between 5 pf and 15 pf.
TXCLK
Clock to output delay for TXD and TXEN
TXD and TXEN hold time after TXCLK
TXEN
CRS
delay.
t
outdly
DESCRIPTION
Table 3.12 Turbo MII Output Timing Values
Figure 3.1 Turbo MII Output Timing
DATASHEET
30
MIN
1.5
t
Hi-Speed USB 2.0 to 10/100 Ethernet Controller
txhold
MAX
12.5
SMSC LAN9500/LAN9500i
UNITS
ns
ns
Note 3.12
Note 3.13
Note 3.13
NOTES
Datasheet