Rainbow-electronics LM85 Bedienungsanleitung PDF herunterladen (Seite 3)

Pin Descriptions (Continued)

Symbol Pin Typ Name and Function/Connection

Remote

Remote1+ 18 Remote Thermal

Diode Positive

Input

Positive input (current source) from the first remote thermal diode.

Serves as the positive input into the A/D. Connected to

THERMDA pin of Pentium processor or the base of a diode

connected MMBT3904 NPN transistor.

Remote1− 17 Remote Thermal

Diode Negative

Input

Negative input (current sink) from the first remote thermal diode.

Serves as the negative input into the A/D. Connected to

THERMDC pin of Pentium processor or the emmiter of a diode

connected MMBT3904 NPN transistor.

Remote2+ 16 Remote Thermal

Diode Positive

Output

Positive input (current source) from the first remote thermal diode.

Serves as the positive input into the A/D. Connected to

THERMDA pin of Pentium processor or the base of a diode

connected MMBT3904 NPN transistor.

Remote2− 15 Remote Thermal

Diode Negative

Input

Negative input (current sink) from the first remote thermal diode.

Serves as the negative input into the A/D. Connected to

THERMDC pin of Pentium processor or the emmiter of a diode

connected MMBT3904 NPN transistor.

Fan

Tachometer

Inputs

TACH1 11 Digital Input Input for monitoring tachometer output of fan 1.

TACH2 12 Digital Input Input for monitoring tachometer output of fan 2.

TACH3 9 Digital Input Input for monitoring tachometer output of fan 3.

TACH4/Address

Select

14 Digital Input Input for monitoring tachometer output of fan 4. If in Address

Select Mode, determines the SMBus address of the LM85.

Fan

Control

PWM1/xTest

Out

24 Digital Open-Drain

Output

Fan speed control 1. When in XOR tree test mode, functions as

XOR Tree output.

PWM2 10 Digital Open-Drain

Output

Fan speed control 2.

PWM3/Address

Enable

13 Digital Open-Drain

Output

Fan speed control 3. Pull to ground at power on to enable

Address Select Mode (Address Select pin controls SMBus

address of the device).

LM85

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