82541EI データシートの表示（PDF） - Intel

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82541EI

82541 Family of Gigabit Ethernet Controllers

Intel 

82541(PI/GI/EI) — Networking Silicon

3.7.2

3.7.3

Grounds, Reserved Pins and No Connects

Symbol Type

Name and Function

VSS

P

AVSS

P

RSVD_VSS P

RSVD_NC P

NC

P

Ground.

Shared analog Ground.

Reserved Ground. This pin is reserved by Intel and may have factory test functions.

For normal operation, connect to ground.

Reserved No connect. This pin is reserved by Intel and may have factory test

functions. For normal operation, do not connect any circuit to these pins. Do not

connect pull-up or pull-down resistors.

No Connect. This pin is not connected internally.

Voltage Regulation Control Signals (2)

Symbol

CTRL12

CTRL18

Type

Name and Function

1.2 V Control. LDO voltage regulator output to drive external PNP pass transistor. If

A

1.2 V is already present in the system, leave output unconnected. To achieve optimal

D3 power consumption, leave the output unconnected and use a high-efficiency

external regulator.

1.8 V Control. LDO voltage regulator output to drive external PNP pass transistor. If

A

1.8 V is already present in the system, leave output unconnected. To achieve optimal

D3 power consumption, leave the output unconnected and use a high-efficiency

external regulator.

18

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