3 ground and no connects, 4 control signals, Ground and no connects – Intel 82540EP User Manual
Page 22: Control signals, 3 ground and no connects 3.7.4 control signals
82540EP — Networking Silicon
16
Datasheet
3.7.3
Ground and No Connects
3.7.4
Control Signals
Symbol
Type
Name and Function
GND
P
Ground.
NC
P
No Connect.
Do not connect any circuitry to these pins. Pull-up or pull-down resistors
should not be connected to these pins.
Symbol
Type
Name and Function
CTRL_15
A
1.5V Control.
LDO voltage regulator output to drive external pass transistor. If 1.5V is
already present in the system, leave output unconnected. To achieve optimal D
3
power
consumption (<50 mw), leave the output unconnected and use a high-efficiency
external switching regulator.
CTRL_25
A
2.5V Control.
LDO voltage regulator output to drive external pass transistor. If 2.5V is
already present in the system, leave output unconnected. To achieve optimal D
3
power
consumption (<50 mw), leave the output unconnected and use a high-efficiency
external switching regulator.