ax88796blf ASIX Electronics Corporation, ax88796blf Datasheet - Page 64

• Manufacturer Part Number: ax88796blf
• Description: Low-pin-count Non-pci 8/16-bit 10/100m Fast Ethernet Controller
• Manufacturer: ASIX Electronics Corporation

*1 :
VCC3R3/VCC3IO/VCC3A3
XTALIN/XTALOUT
RSTn
VCCK/VCC18A
7.3.3 Power-up Sequence
The recommended power-up sequence shown below shall be met in order to avoid potential extra current that may
happen due to the power supply delay between the 3.3V and 1.8V power pins of the chip during power ramping up time.
Symbol
T
Trise3 3.3V power supply rise time
Trise2 1.8V power supply rise time
T
Please refer to 7.4.1 Reset Timing for the details about the Trst.
delay32
T
rst_pu
clk
3.3V rise to 1.8V rise time
delay
25Mhz crystal oscillator
start-up time
RSTn low level interval
time from power-up
Parameter
From VCC18A = 1.8V to first clock
transition of XTALIN or XTALOUT
From VCCK/VCC18A = 1.8V and
VCC3IO = 3.3V to RSTn going high
Trise3
Trise2
From 0V to 3.3V
From 0V to 1.8V
Condition
64
Tdelay32
Tclk
AX88796BLF / AX88796BLI
Trst_pu
ASIX ELECTRONICS CORPORATION
T
clk +
Min
-5
1
-
-
Trst
*1
Typ
1
-
-
Max
3.3V
0V
10
10
0V
5
1.8V
-
-
Unit
ms
ms
ms
ms
ms