MAX6654 Evaluation System

2

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Quick Start

Before you begin, you will need the following equip-

ment:

• An IBM PC-compatible computer running Windows

95/98/2000

• A parallel printer port (this is a 25-pin socket on the

back of the computer)

• A standard 25-pin, straight-through, male-to-female

cable (printer extension cable) to connect the com-

puter’s parallel port to the SMBus interface board

• A DC power supply capable of supplying any volt-

age between +7V and +20V at 100mA

Procedure

1) Carefully connect the boards by aligning the 20-pin

connector of the MAX6654 EV kit with the 20-pin

header of the MAXSMBUS interface board. Gently

press them together. The two boards should be

flush against each other.

2) Make sure switch SW1 on the MAX6654 EV kit is in

the OFF position.

Do not turn on the power until all connections are

made.

3) Connect the power supply to the pads labeled

POS9 and GND1 of the SMBus interface board.

4) Make sure JU3 is set to the 1-2 position.

5) Connect a cable from the computer’s parallel port to

the SMBus interface board. Use a straight-through

25-pin female-to-male cable. To avoid damaging the

EV kit or your computer, do not use a 25-pin SCSI

port or any other connector that is physically similar

to the 25-pin parallel printer port.

6) The MAX6654.EXE software program can be run

from the floppy or hard drive. Use the Windows pro-

gram manager to run the program. If desired, you

may use the INSTALL.EXE program to copy the

files and create icons for them in the Windows

95/98/2000 Start menu. An uninstall program is

included with the software. Click on the UNINSTALL

icon to remove the EV kit software from the hard

drive.

7) Turn on the power supply.

8) Turn the EV kit on by moving SW1 to the ON posi-

tion.

9) Start the MAX6654 program by opening its icon in

the Start menu.

10) Observe as the program automatically detects the

address of the MAX6654 and starts the main program.

Note: The MAX6654 reads the address select pins

at device power-up only.

Detailed Description

User-Interface Panel

The user interface is easy to operate. Use the mouse,

or press the Tab key to navigate with the arrow keys.

Each of the buttons corresponds to bits in the com-

mand and configuration bytes. By clicking on them, the

correct SMBus write operation is generated to update

the internal registers.

Note: Words in bold are user-selectable features in the

software.

The program continually polls the device for new tem-

perature data and status, and monitors for alert condi-

tions. To disable the continuous polling of data,

uncheck the Automatic Read checkbox. To change

select the appropriate data field and type in the new

value. Pressing Enter, after typing in the new values,

updates the internal registers.

If an interrupt condition is generated by the tempera-

ture crossing one of the alarm threshold levels, the

message ALERT will appear. To clear the interrupt, first

eliminate the condition that caused it and then click on

Read Alert. This action reads the Alert Response

address, returns the value of the current MAX6654

slave address, and clears the interrupt. Note: The least

significant bit (LSB) of the address is the read/write sta-

tus bit; therefore, the address returned will be 1 higher.

To make single-shot conversions, check the STOP

checkbox under Configuration Byte, and then click on

the One-Shot button. Single-shot conversions can also

be performed while the device is autoconverting. The

SUPPLIER

PHONE

FAX

Central Semiconductor

515-435-1110

515-435-1824

Fairchild

408-822-2000

408-822-2102

General Semiconductor

631-847-3000

631-847-3236

Murata

814-237-1431

814-238-0490

On Semiconductor

602-303-5454

602-994-6430

Taiyo Yuden

408-573-4150

408-573-4159

Vishay/Lite-On Diodes, Inc.

805-446-4800

805-446-4850

Component Suppliers

Note: Please indicate you are using the MAX6654 when con-

tacting these component suppliers.