LAN91C96I Datasheet, PDF (108/110 Pages) SMSC Corporation – NON-PCI SINGLE-CHIP FULL DUPLES ETHERNET CONTROLLER

Non-PCI Single-Chip Full Duplex Ethernet Controller
CLOCK
t1
t2
t2
tR
tF
Figure 12.20 – Input Clock Timing
NAME DESCRIPTION
MIN
TYP
MAX
UNITS
t1
Clock Cycle Time for 20 MHz
50
ns
t2
Clock High Time/Low Time for 20 MHz
30/20
20/30
ns
tR, tF Clock Rise Time/Fall Time
5
ns
Xtal1 Startup time (from 1.6v of Vcc rising)
50
msec
Xtal1 Capture Range (Xtal1 frequency
19.7
variation)
20.3
MHz
Xtal Internal feedback resistor
1
3
Meg Ohm
ADDRESS
DATA
REGISTER
nIOWR
t45
POINTER
REGISTER
Parameter
t45 Last Access to Data Register to Pointer
Reloaded
min
typ
2 * t20
max
units
ns
Figure 12.21 – Memory Write Timing
Rev. 11/18/2004
Page 108
DATASHEET
SMSC DS – LAN91C96I