EV2400

EVAL MODULE INTERFACE BOARD

Thisuser'sguidedescribesthefunctionandoperationof theEV2400evaluationmoduleinterfaceboard.Acompletedescription,aswellasthebillofmaterialsandschematicareincluded.

1 Introduction

The EV2400 EVM interface board enables an IBM-compatible or other type PC (with the required driver for its particular platform) to communicate with the Texas Instruments SMBus and I2C interface gas gauges via a Universal Serial Bus (USB) port. In addition to this board, PC software is required to interpret the gas gauge data to complete the evaluation system.

1.1 Features

• Fully powered from the USB port

• Optional 5-V port for powering high-power voltage drivers (future upgrade)

• Complete interface between the USB and SMBus or I2C interfaces using a simple API

• Expansion port for future upgrades

1.2 Kit Contents

• EV2400 circuit module

• Standard USB cable

1.3 Ordering Information

2 Interfaces

The EV2400 interfaces are described in the following table. The reference designators on the circuit board and the functions are also listed.

2.1 Overview

The EV2400 ports are shown in Figure 1.

2.2 EV2400 Controller

The EV2400 controller is an MSP430F5529 running at 4 MHz. The controller firmware is stored in flash memory and is executed by the core at power-up.

The controller communicates with target device(s) through either: a 2-wire SMBus communication port, a 2-wire EEPROM I2C port, or a single-wire HDQ port. The 2-wire SMBus communication port supports both SMBus and I2C protocols. CRC-8 checksum verification for the data packets prevents data corruption over the USB.

2.3 USBInterface (USB)

The interface board connects to a USB port (version 1.1 or later) on a host computer and is powered from the port. All communication over the USB is human Interface device (HID) class. Drivers are built into Windows® and most of the operating systems.

2.4 HDQInterface (HDQ)

This interface allows a host computer to interact with an HDQ interface device such as a battery monitor device through a 1-wire HDQ interface. Connect the data and ground reference (VSS) to a target device.

2.5 I2C Interface (I2C)

This interface allows a host computer to interact with I2C interfaces, such as a battery monitor device and EEPROM through a 2-wire I2C interface. Connect the data, clock, and a ground reference (VSS) to a target device.

2.6 SMBusInterface (SMBus)

This interface allows a host computer to interact with an SMBus interface device such as a battery monitor device through a 2-wire SMBus interface. Connect the data, clock, and a ground reference (VSS) to a target device.