EVAL-ADM1030/31

–6–

REV. PrA

Preliminary Technical Data

PRELIMINAR

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TECHNICAL

DA

TA

CONNECTORS AND SWITCHES AND INDICATORS

The function of the various connectors, switches and

indicators on the evaluation board are explained below.

CENTRONICS CONNECTOR (J3)

The evaluation board may be connected to the personal

computer via the parallel printer port using the centronics

cable provided.

POWER CONNECTORS (J4 & J6)

Power is supplied to the board via J6 using a 15V Power

Supply mains adaptor. This adaptor is not included in the

evaluation kit. Alternatively power may be supplied to the

board via J4 thus allowing a desktop power supply to be

used.

TEST CONNECTOR (J7)

J7 is provided as a test connector on the ADM1030/31

evaluation board. The remote thermal diode pins, SMBus

and Power pins are all connected to here. This allows the

user easy access to ADM1030/31 signals.

An off board thermal sensor may be connected as the

external sensor via the remote thermal diode pins of the

test connector.

FAN CONNECTORS (J1 AND J2)

The fans which are to be controlled by the ADM1030/31

are connected to the board using these connectors.

SMBUS CONNECTOR (J8)

This connector allows the user easy access to the SMBus

signals and may be used if the user wishes to communicate

with the ADM1030/31 in a different way other than using

the Centronics connector.

TACH\AIN SWITCH (S1 AND S2)

This essentially allows the user to switch between a fan

with a Tach Signal and one without. In this case switching

off the Tach signal will automatically switch in the Rsense

circuit which is used to determine the fan speed without

the Tach signal. Details of this method of fan speed

measurement are provided on the datasheet.

REMOTE DIODE SWITCH (S3 AND S4)

This switch allows the user to choose between the on-

board remote temperature sensors (Q3 and Q4) and ones

that can be connected to the test connector J7. When the

switch is in the on position the on-board sensors are

selected. When it is in the off position the off-board sensor

is selected.

ADDRESS SELECT SWITCH (S5)

The ADM1030/31 has an SMBus Address pin (ADD).

This is a tri-state logic input which sets the lower 2 bits of

the SMBus address.

TABLE1. ADD PIN TRUTH TABLE

ADD Pin

A1

A0

SW5

Gnd

0

0

Lo

No Connect

1

0

Center

Vcc

0

1

Hi

THERM LED (D1)

This LED illuminates whenever a measured temperature

exceeds a pre-programmed

THERM Limit.

FAN_FAULT LED (D2)

This LED will illuminate whenever a fan fault is detected.

If there is a second fan connected then this should spin up

to full speed.

POWER LED (D3)

This LED illuminates whenever power is supplied to the

board.

INT LED (D4)

This LED

illuminates whenever the ADM1030/31 issues

an interrupt signal (eg. when an out of limit measurement

is made). For more information on the various conditions

which cause INT to be pulled low please see the datasheet.