Amazon Alexa Voice Service (AVS) applications. The kit is based on the XMOS XVF3000 voice processor and integrates the xCORE microphone capture and voice processing library with all the necessary hardware...
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VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 2/25 Figure 1: xCORE VocalFusion BaseBoard Figure 2: xCORE VocalFusion Short Linear microphone board XM011897A...
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VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 3/25 1 Features A block diagram for the xCORE VocalFusion 4-Mic Kit for Amazon AVS is shown in Figure below. It includes: xCORE VocalFusion XVF3000 voice processor Four MEMS microphones (on a separate board) A micro-USB connector for power (and optionally USB2.0 device connectivity)
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(LINEAR MICROPHONE ARRAY E, Figure 2) using Infineon IM69D130 MEMS microphones. The VocalFusion BaseBoard is based on the XMOS XVF3000 device, running a software which integrates the xCORE microphone capture and voice processing library to provide: beamforming, acoustic echo cancellation, noise suppression, de-reverberation and automatic gain control.
VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 5/25 3 Clock sources and distribution The BaseBoard includes a single clock generator (Si5351A-B04486-GT, U25) that generates two clocks: XVF3000 reference clock - 24MHz oscillator Low jitter master audio clock - 24.576MHz oscillator, used for the DAC and (indirectly) the microphones The clock generator is controlled over the I2C bus (see §6, below).
VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 6/25 Extension header J6 Clock Figure 5: DAC and 3.5mm audio jack locations jack 5 MEMS microphone board The microphone board is plugged into connector J3 on the BaseBoard using a ribbon cable.
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VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 7/25 The microphone array consists of a linear array of four microphones (spaced 33mm apart), a clock buffer, voltage level shifters and an EEPROM for optional identification. The microphone signals are mapped onto the XVF3000 device as shown in Figure 7.
VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 8/25 6 I2C bus The BaseBoard has a main I2C bus that is used to control the DAC, clock generator, and EEPROM. This main I2C bus is connected to tile 1 of the XVF3000, with the XVF3000 acting as a master on this I2C bus.
VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 9/25 7 General purpose user interface The BaseBoard has 13 LEDs that are controlled by the XVF3000 GPIO. LED_0 - LED_11 (D2-D13) are positioned around the edge of the BaseBoard. LED_12 (D14) is positioned in the middle of the BaseBoard.
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XVF3000, to be played out from the DAC. The software pre-flashed in to the xCORE VocalFusion 4-Mic Kit for Amazon AVS configures the XVF3000 device and BaseBoard hardware to use these extension headers;...
VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 13/25 9 USB port The USB micro-B port (J1) provides power for all the on-board circuits and is used to generate the following voltage rails: +1V0 (Core voltage to XMOS device) +2V5 (for headphone amplifier in DAC device)
VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 14/25 10 Flash memory The XVF3000 device includes 2MBytes of QSPI flash memory, which is interfaced by the GPIO connections shown in Figure 15: QSPI connection Port QSPI_SS X0D01 QSP_D0 X0D04...
VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 15/25 11 xSYS connector A standard XMOS xSYS interface (J2) is provided to allow host debug of the board via JTAG. Extension header J6 Clock Figure 16: XSYS connector jack xSYS signal...
VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 16/25 12 xCORE VocalFusion BaseBoard portmap The table below provides a full description of the port-pin mappings described throughout this document for the xCORE VocalFusion BaseBoard. 1-bit 4-bit 8-bit 16-bit 32-bit...
The xCORE VocalFusion 4-Mic Kit for Amazon AVS complies with appropriate RoHS2 and REACH regulations and is a Pb-free product. The xCORE VocalFusion 4-Mic Kit for Amazon AVS is subject to the European Union WEEE directive and should not be disposed of in household waste. Alternative requirements may apply outside of the EU.
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VocalFusion 4-Mic Kit for Amazon AVS Hardware Manual 19/25 16 Schematics The schematics for the Base Board included in the kit, are shown in the first five figures below, followed by the schematics for the linear array board. For full reference schematics please contact XMOS: https://www.xmos.com/contact/enquiries...
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