AX88178

USB to 10/100/1000 Gigabit Ethernet/HomePNA Controller

7.3 Power-up Sequence

At power-up, AX88178 requires the VDD3/AVDD3 power supply to rise to nominal operating voltage within Trise3 and

the VDDK/AVDD2/AVDDK power supply to rise to nominal operating voltage within Trise2.

Tdelay32

Trise2

Trise3

3.3V

VDD3/AVDD3

0V

2.5V

VDDK/VDD2/AVDDK

0V

Symbol

Parameter

Condition

Min

Typ

Max

Unit

3.3V power supply rise time

From 0V to 3.3V

-

-

10

ms

2.5V power supply rise time

From 0V to 2.5V

-

-

10

ms

3.3V rise to 2.5V rise time delay

-5

-

5

ms

7.4 AC Timing Characteristics

7.4.1 Clock Timing

7.4.1.1 XIN12M

Symbol

Parameter

Condition

Min

Typ

Max

Unit

XIN12M clock cycle time

-

83.33

-

ns

XIN12M clock high time

-

41.6

-

ns

XIN12M clock low time

-

41.6

-

ns

XIN12M rise time

-

-

1.0

ns

XIN12M fall time

-

-

1.0

ns

ASIX ELECTRONICS CORPORATION

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