Cirrus Logic CDB5490U - Manual (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