This user guide explains the design and setup of the ADAU1781 SigmaDSP, this evaluation board provides full access to all analog and digital I/Os on the ADAU1781. The SigmaDSP is controlled by Analog Devices, Inc., SigmaStudio™ software, which interfaces to the board via a USB connection. This evaluation board can be powered either over the USB bus or by a single 3.8 V to 6 V supply, which is regulated to the voltages required on the board. The PC board is a 4-layer design, with a single ground plane and a single power plane on the inner layers. The board contains on-board microphones and speaker, and connectors for external microphones and speaker. The master clock can be provided externally or by the on-board 12.288 MHz active oscillator.
The document provides a comprehensive overview of the EVAL-ADAU1781Z package contents, including the evaluation board, USBi communications adapter, and necessary documentation. It details the general description of the board's capabilities, such as full access to analog and digital I/Os, onboard microphones and speakers, and support for external master clocks or an on-board 12.288 MHz oscillator.
| Master Clock Frequency | 12.288 MHz active oscillator |
|---|---|
| Board Design Layers | 4-layer design |
It can be powered either over the USB bus or by a single 3.8 V to 6 V supply.
The board can be powered either over the USB bus or by a single 3.8 V to 6 V supply.
The board includes an active oscillator that provides a 12.288 MHz master clock.
Switch S3 (MCKI SOURCE) should be in the up position and Switch S4 (IN SELECT) should be in the right position.