XMOS VocalFusion XVF3510 User Manual page 17

NOTE: Users are recommended to check the website for the latest firmware update, and to follow the
instructions below to update the stored firmware before operation.
The VocalFusion development kit for Amazon AVS, associated setup documents and host code enable
users to build a complete Amazon Alexa endpoint with the addition of a Raspberry PI (not supplied).
The XVF3510-INT connects to the Raspberry PI using I2S for audio, and I2C for control. The signal
flow through the development kit is shown below.
Figure 3-1 Signal flow of the VocalFusion development kit for Amazon AVS (XVF33510-INT)
The VocalFusion development kit provides a USB connection for audio and control. This can be used
for evaluation of other ASRs or simply connected to a laptop or computer for audio analysis. In this
configuration only the XVF3510 processor board and Microphone Array board are required. The signal
flow is shown below:
Figure 3-2 Signal flow of the VocalFusion dev kit (XVF33510-UA)
NOTE: In order to operate the latest firmware releases on v1.0 and v1.1 development kits a simple
modification is required. This is detailed in a design advisory available on the website
(https://www.xmos.com/documents/vocalfusion)
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