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AX88796BLF 데이터시트(PDF) 80 Page - ASIX Electronics Corporation

부품명 AX88796BLF
상세설명  Low-pin-count Non-PCI 8/16-bit 10/100M Fast Ethernet Controller
PDF  82 Pages
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제조업체  ASIX [ASIX Electronics Corporation]
홈페이지  http://www.asix.com.tw
Logo ASIX - ASIX Electronics Corporation

AX88796BLF 데이터시트(HTML) 80 Page - ASIX Electronics Corporation

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AX88796BLF / AX88796BLI
Appendix B: Disable AX88796B voltage regulator
AX88796B integrates an on-chip 3.3V to 1.8V voltage regulator for single-power supply system design. If the
system have 1.8V power source already, user may like to disable AX88796B voltage regulator and use the existing
1.8V power source (probably a higher efficiency version). In that case, user can connect VCC3R3 (pin-10) and
GND3R3 (pin-11) to ground, keep V18F (pin-9) open, and set REGSTB bit of PMR register (see Page3 Offset 0BH
bit-4 in section 5.1.56 Power Management Register (PMR)) to 0 (i.e. logic "low") to avoid the leakage current.
Please refer to below picture for details.
Note: If user connects the VCC3R3 to 3.3V VCC and wants to disable the internal voltage regulator of AX88796B,
the REGSTB bit of PMR register should be set to 1 to set the regulator in standby mode to reduce the leakage
current.
AX88796B
V18F
REGSTB
VCC18A
VCCK
VCC3R3
GND3R3
Keep NC without loading
Supply Analog 1.8V from existing power
source on system
Supply Digital 1.8V from existing power source
on system
Logic “low”



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