Cirrus-logic CDB5490U Manuel d'utilisateur télécharger pdf (Page 5)

CDB5490U

DS923DB5 5

1. HARDWARE

1.1 Introduction

The CDB5490U evaluation board provides a convenient means of evaluating the CS5490 energy mea-

surement IC. The CDB5490U evaluation board operates from a single USB or 5V power supply. An op-

tional 3.3V power supply input is available for powering the CS5490 directly. The evaluation board

interfaces the CS5490 to a PC via a USB cable. To accomplish this, the board comes equipped with a

C8051F342 microcontroller and a USB interface. Additionally, the CDB5490U GUI software provides

easy access to the internal registers of the CS5490. The software provides a means to display the on-chip

ADC performance in the time domain or frequency domain.

1.2 Evaluation Board Overview

The board is partitioned into two main sections: analog and digital. The analog section consists of the

CS5490, passive anti-aliasing filters, and a high-voltage section with an attenuation resistor network. The

digital section consists of the C8051F342 microcontroller, LCD, test switches, reset circuitry, and USB in-

terface. The board also has a user-friendly power supply connection. The assembly information and de-

fault configurations for jumpers are shown below.

Figure 1. CDB5490U Assembly Drawing and Default Configuration

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Cirrus-logic CDB5490U Manuel d'utilisateur Page 5