# Soundec Playground Evaluation Suite User Manual

Hardware and Software Evaluation tool for SNC8x series professional audio processor (integrated AI algorithms and high-quality Codec, high-performance DSP, high-speed USB, and PMU)

# Part List

  • Soundec Playground Evaluation Board

  • SNC8600 Core Board

  • 2 * USB-A to USB-C cables

  • Adaptor Boards

# Documents

# Typical Applications

# Evalation Board

The Soundec Playground evaluation board provides all necessary analog/digital input and output interfaces for the SNC8x series professional audio processors. Users can easily communicate and debug with Tensilica HiFi3 DSP through the built-in USB to serial controller of the evaluation board or the standard JTAG controller. The SNC8x series professional audio processor can be customized and developed based on the SDK, and can also be debugged without coding.

The Soundec Playground evaluation board supports a series of adaptor boards to achieve various audio services, and personalized hardware configurations can be added through the universal board to quickly complete product prototype construction. Simply connect to a simple USB 5V power supply, and all other onboard voltages are provided by the Soundec Playground evaluation board. PCBA adopts a four layer board design, which includes a grounding layer and a power supply layer. The core clock is provided by the onboard 24MHz crystal oscillator.

# Layout

The following picture shows the layout of the evaluation board

# Preparation

# Download and Install "Soundec Studio"

Soundec provides a supporting software for the evaluation suite, Soundec Studio. Please follow the steps below to download and install:

Dowload Soundec Studio (opens new window), Save to computer. Uncompress zip file and run "SoundecStudio.exe".

# Default settings for switches and jumpers

The following table lists the default settings for switches and jumpers on the evaluation board:

Jumper and Switch Connections Option Selected
S1 ON USB provides 5V power
P1 ON USB provides 5V power
P4 ON Enable IP33 VOUT
P5 ON Enable IO33 VOUT
P6 ON RESET pin pulled up by IO33
S2 OFF Turn off DFU
S3 UART Turn on Debug

Before using the evaluation board for the first time, please confirm that the switch and jumper settings are consistent with the above table.

# Begin to Use

# Power

J2 is the power supply interface of the evaluation board. This is a USB-C female interface, and it is recommended to use a 5V/1A power supply.

# Control Port

J2 is also the control port of the evaluation board. After installing Soundec Studio on the computer, please use a USB cable to connect, run Soundec Studio, and follow the prompts.

# Audio Codec Interfaces

# Audio Input and Output

Soundec Playground has multiple audio input and output options, including digital and analog. There are three analog inputs, three analog output, up to ten digital microphone channels, and up to three serial audio interface ports.

# Analog Audio Input

The evaluation board provides two types of analog inputs: a single ended stereo headphone interface (J8) and a dual Line In differential interface (J3 and J4). Each analog input supports programmable analog gain amplifiers.

Please refer to the table below for the selection of analog input signals.

ADC channel Jumper Audio Input
ADC1 P10 on,P12 on Single-end
ADC1 P10 off,P12 off Differential-end
ADC2 P11 on,P13 on Single-end
ADC2 P11 off,P13 off Differential-end


  1. Single-end input ports and differential-end input ports cannot be used simultaneously.

  2. Analog input can also be connected to the input of adapter board through the P3. When the audio input is connected to adapter board, the audio input port on the evaluation board cannot be used.

# Analog output

The evaluation board provides two types of analog outputs: a single-end stereo headphone interface and a dual differential interface.

In headphone output mode, the typical load is 16 Ω (60mW) to 32 Ω (30mW). By default, the load on Soundec Playground is 32 Ω.


  1. The analog output can also be connected to the output of adapter board through the P3. When the audio output is connected to adapter board, the audio output port on the evaluation board cannot be used.
# Digtial Microphone

There are up to 10 DMIC input ports on Soundec Playground. It can be connected to the microphone array adapter board through P3. DMIC is input through the interface on the adapter board.

Pin Pin Number
VDDIP33 P3-15
DMIC Clock1 P3-26
DMIC Data1 and DMIC Data2 P3-25
DMIC Clock2 P3-28
DMIC Data3 and DMIC Data4 P3-27
DMIC Clock3 P3-30
DMIC Data5 and DMIC Data6 P3-29
DMIC Clock4 P3-33
DMIC Data7 and DMIC Data8 P3-31
DMIC Clock8 P3-34
DMIC Data9 and DMIC Data10 P3-32
# I2S

P2 and P3 can connect to I2S audio streams and support TDM format. The IOVDD logic level is 3.3 V.

Pin Pin Number
I2S1 Data Out P2-2
I2S1 Data In P2-4
I2S1 Frame Clock P2-6
I2S1 Bit Clock P2-8
MP0 P2-10
I2S2 Data Out P3-2
I2S2 Data In P3-4
I2S2 Frame Clock P3-6
I2S2 Bit Clock P3-8
External MCLK Input P3-10

# Other Interfaces


There is a JTAG port pin in P2, which supports communication with Tensilia HiFi 3 DSP through J-Link for debugging and tracking.


J1 is a USB-C female interface that supports UART protocol and evaluation board interaction.

# Hardware Description

# Ports

The following table lists the connection port functions of the evaluation board:

Name Function Description
P1 POWER_5V connection connect USB 5V to core board; current monitoring
P2 JTAG interface JTAG connection
P3 Adaptor Board Interface Connect to adapator board
P4 IP33 output IP33 output
P5 IO33 output IO33 output
P6 RESET selection RESET pull-up and pull-down selection
P7 Wake up selection Always_ON pull-up and pull-down selection
P8 Universal Board Interface Connect to universal board
P9 Universal Board Fix Fix universal board
P10 MICBIAS1 selection provide bias to ADC1 when connect to ECM
P11 MICBIAS2 selection provide bias to ADC2 when connect to ECM
P12 ADC1 single-end selection AIN1 connect to ground for ADC1 single-end input
P13 ADC2 single-end selection AIN2 connect to ground for ADC2 single-end input
P14 RX disconnect Disconnect RX with adptor board
P15 TX disconnect Disconnect TX with adptor board

The following table lists the pin definitions for the P3 application module interface:

The following figure is a schematic diagram of P3 pins:

The following figure shows the pin layout of P3:

# Evaluation Board Schematics

Part 1:

Part 2:

Part 3:

Part 4:

Part 5:

Part 6:

Part 7:

Part 8:

Part 9:

Part 10:

Part 11:

Part 12:

Part 13:

Part 14:

Part 15:

Part 16:

Signal Diagram:

Layer 1, Component Side:

Layer 2, signal Plane:

Layer 3, signal Plane:

Layer 4, Bottom Side:


The following is BOM list for the evaluation board: