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February 20021MIC280 Evaluation Board

MIC280 Evaluation Board

DemoWare™ Software

General Description

The Micrel MIC280 evaluation board and DemoWare™ soft-

ware demonstrate the operation and features of the MIC280

Precision IttyBitty™ Thermal Supervisor. The MIC280 is a

versatile digital thermal supervisor capable of measuring

internal temperature and remote temperature. This manual

describes how to use the evaluation board and the compan-

ion software.

Getting Started

What is Included

Review the packing list in Table 1 to conrm that you received

all listed items. If any of the items are missing or damaged,

contact Micrel Semiconductor. The latest version of all Micrel

data sheets may be obtained from our website at

www.micrel.com

.

Item QtyDescription

11MIC280 Evaluation Board with

Jumpers Installed

21MIC280 Evaluation Board and

DemoWare Software Manual

(this document)

31MIC280 Data Sheet

42MIC280-0BM6 Samples

Table 1.Packing List

What You Must Provide

If the board is to be used with the MIC280 DemoWare, no

additional items are required except for a suitable host PC. All

power for the board will be drawn from the PC parallel port.

The board may be plugged directly into the DB25 connector

on the host PC. It may be more convenient, however, to use

a cable between the PC and the board. A standard, straight-

through, DB25 male-to-female cable may be used. The

MIC280 DemoWare software may be downloaded from

Micrel’s website at

http://www.micrel.com

. Instructions for

installing this software are included.

Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com••• •••

DemoWare is a trademark of Micrel, Inc.

IttyBitty is a trademark of Micrel, Inc.

SMBus is a trademark of Intel Corporation.

I2C is a trademark of Philips Electronics N.V.

ACCESS.bus is a trademark of the ACCESS.bus Industry Group.

IPort is a trademark of Microcomputer Control Corporation.

If a non-PC host is used, the following items are required for

use with the MIC280 evaluation board:

•3.3V, 100mA regulated power supply

•Power supply leads or cables

• SMBus™/I2C™ compatible serial bus host for communi-

cation with the MIC280

•Cable for serial host connection, as appropriate

In either case, the following additional items are useful, but

not required:

•Logic probe(s)

• Voltmeter(s)

• SMBus/I2C bus analyzer

•Component cooling spray

•Heat gun

General Description of the Evaluation Board

This board demonstrates use of the MIC280 Precision IttyBitty

Thermal Supervisor. It is designed to support rapid prototyping

of circuits employing the MIC280. A MMBT3906 transistor

(surface mount equivalent to 2N3906) is included on the

board in order to demonstrate the MIC280’s ability to mea-

sure the temperature of a remote PN junction. A connector

permits use of an external remote diode or transistor in place

of the on-board remote transistor. User congurable jumpers

select the remote sensor connections and the voltage source

for powering the MIC280. An LED reports the status of the

MIC280’s interrupt request output when enabled.

For use with Micrel’s DemoWare demonstration software, the

MIC280 Evaluation Board may be connected directly to a PC

parallel port via a DB25M connector. As an option, the user

may install a four-pin ACCESS.bus™ type connector to

interface the evaluation board with a serial bus host such as

the IPort™ I2C Host Adapter from MCC Corporation. An

additional general-purpose 5-pin header can also be used to

interface any I2C/SMBus host to the board.

Product specificaties