MAX1668 Evaluation System

2

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Note: Please indicate you are using the MAX1668 when con-

tacting these component suppliers.

Quick Start

Recommended Equipment

Before you begin, you will need the following equip-

ment:

•

IBM PC-compatible computer running Windows

95/98/2000

•

Parallel-printer port (25-pin socket on the back of

the computer)

•

Standard 25-pin, straight-through, male-to-female

cable to connect the computer’s parallel port to the

Maxim SMBus interface board

•

DC power supply capable of supplying +7V to

+20V at 100mA for the SMBus interface board

Procedure

1) Ensure switch SW1 on the MAX1668 EV kit is in the

OFF position. Do not turn on the power until all

connections are made.

2) Carefully connect the boards by aligning the

MAX1668 EV kit’s 20-pin connector with the 20-pin

header of the MAXSMBUS interface board. Gently

press them together. The two boards should be

flush against each other.

3) Connect a cable from the computer’s parallel port

to the SMBus interface board. Use a 25-pin,

straight-through, male-to-female 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.

4) The MAX1668.EXE software program can be run

from the floppy or hard drive. Use the Windows

Program 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 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.

5) Connect the +7V to +20V DC power supply to the

pads labeled POS9 and GND1 of the SMBus inter-

face board.

6) Turn on the power supply.

7) Turn the EV kit on by moving SW1 to the ON position.

8) Start the MAX1668 program by opening its icon in

the Start Menu.

9) Observe as the program automatically detects the

MAX1668 address and starts the main program.

Software 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 command and

configuration bytes. By clicking on them, the correct

SMBus write operation is generated to update the inter-

nal registers.

The program continually polls the device for new tem-

perature data and status, and monitors for alert condi-

parison registers, 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 temperature

crossing one of the alarm threshold levels, the ALERT

message will be displayed in the alert box. To clear the

interrupt, first eliminate the condition that caused it, then

click on Read Alert. This action reads the Alert

Response address, returns the value of the current

MAX1668 slave address, and clears the interrupt.

Note:

The least significant bit of the address is the

read/write status bit; therefore, the address returned will

be 1 higher.

Component Suppliers

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

Motorola

303-675-2140

303-675-2150

Taiyo Yuden

408-573-4150

408-573-4159

Vishay Liteon/Diodes Inc.

805-446-4800

805-446-4850