82540EP Datasheet, PDF (20/46 Pages) Intel Corporation – 82540EP Gigabit Ethernet Controller

82540EP — Networking Silicon
3.7.3
3.7.4
Ground and No Connects
Symbol
GND
NC
Type
Name and Function
P
Ground.
P
No Connect. Do not connect any circuitry to these pins. Pull-up or pull-down resistors
should not be connected to these pins.
Control Signals
Symbol
CTRL15
CTRL25
Type
Name and Function
1.5V Control. LDO voltage regulator output to drive external pass transistor. If 1.5 V is
A
already present in the system, leave output unconnected. To achieve optimal D₃ power
consumption (<50 mw), leave the output unconnected and use a high-efficiency
external switching regulator.
2.5V Control. LDO voltage regulator output to drive external pass transistor. If 2.5 V is
A
already present in the system, leave output unconnected. To achieve optimal D₃ power
consumption (<50 mw), leave the output unconnected and use a high-efficiency
external switching regulator.
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