AX88179
USB 3.0 to 10/100/1000M Gigabit Ethernet Controller
7.5 AC Timing Characteristics
Notice that the following AC timing specifications for output pins are based on CL (Output load)
equal to 50pF.
7.5.1 Clock Timing
XTL25P
TP_XTL25P
TH_XTL25P
TL_XTL25P
VIH
VIL
Symbol
Parameter
Condition
Min
Typ
40.0
20.0
20.0
Max
Unit
ns
ns
TP_XTL25P XTL25P clock cycle time
TH_XTL25P XTL25P clock high time
TL_XTL25P XTL25P clock low time
-
-
-
-
-
-
ns
7.5.2 Reset Timing
XTL25P
RESET_N
Trst
Symbol
Description
Min
125
Typ
-
Max
250000
Unit
XTL25P clock cycle (Note)
Trst Reset pulse width after XTL25P is running
Note: If the system applications require using hardware reset pin, RESET_N, to reset AX88179 during device initialization
or normal operation after VBUS pin is asserted, the above timing spec (Min=5μ s, Max=10ms) of RESET_N should
be met.
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