TSA1702A Audio DSP Board
The TSA1702A is a DSP audio board that can power a micro USB cable or any DC 9V-30V power supply. It is a complete audio-digital signal processing module. The main DSP chip on this module is the ADAU1701. The application range covers active loudspeaker concepts (such as digital 3-way with 3 units, 2-way with 2 units crossover, bass enhancement, etc.) and enables the transformation from 2.0 to 2.1 systems.
It comes with four potentiometers and has a default program loaded. Customers can adjust the gain, bass, midrange, and treble levels. Additionally, it features a debug port for Sigma Studio, and users can program this module with our USBi programmer to access more functions, including equalization, crossover, bass enhancement, multiband dynamics processing, delay compensation, and so on.
Pins Definition:
| Port name |
Pin name |
Direction |
Description |
| External Potentiometers port |
3.3V |
Power Out |
3.3V Output |
| A_ADC1 |
Analog In |
Treble control |
| A_ADC2 |
Analog In |
Midrange control |
| A_ADC3 |
Analog In |
Bass control |
| A_ADC0 |
Analog In |
Gain control |
| GND |
– |
|
| Aux in Input |
GND |
– |
|
| ADC1 |
Analog In |
Right channel |
| ADC0 |
Analog In |
Left Channel |
| Audio Out1 |
GND |
– |
|
| DAC0 |
Analog Out |
Left Channel |
| DAC1 |
Analog Out |
Right channel |
| Audio Out2 |
GND |
– |
|
| DAC2 |
Analog Out |
Left Channel |
| DAC3 |
Analog Out |
Right channel |
|
|
|
|
Control Buttons: This function is not supported on TSA1702A.
Potentiometers Port: You can connect external POTs (5K~20K) to control the main volume, treble, midrange, and bass. This is our POT kit.
- ADC0: Main volume.
- ADC1: Bass volume.
- ADC2: Middle volume.
- ADC3: Treble volume.
Warning: You need to disconnect the soldering pads on the back side of the board when connecting external potentiometers. Otherwise, the ADC port may be damaged. Potentiometer values: 1Kohm-100Kohm.
DSP Programming Port:
TSA1702A’s DSP detects Bluetooth and Line-in signals, but the default program prioritizes Bluetooth. If a Bluetooth signal is detected, TSA1702B will output the Bluetooth audio source; otherwise, it will output the Line-in audio source. You can develop a DSP program to meet your requirements and then load the new DSP program using a USBi JTAG Sigma DSP programmer.
Features:
- Size: 9cm x 6cm
- 28-/56-bit, 50 MIPS Digital Audio Processor
- Audio out output level: 0.9Vrms
- Audio input signal range: 2Vrms
- Input resistance: 20Kohm
- Fully Programmable with SigmaStudio Graphical tool
- 5V micro USB or DC9-30V Power input
- ADAU DSP integrated
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