MOSA

MS6821

4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control

REV 3

27/29

www.mosanalog.com

DEMO BOARD

Function description

Label 1: Supply Input

Supply voltage range is 2.4V to 6.5V.

Label 2: Headphone Jack

Used 3.5mm diameter of headphone with 32ohm

Label 3: DAC output

Connected to a post-power-amplifier, as active speaker.

In addition, using volume control for DAC, this output can connected to input section (label 6) as feedback.

Label 4: Speaker Output

Connected to speaker with 8ohm or 4 ohm

Label 5: Digital Signal Input

Connected to digital audio formats as I2S, Right Justified and Left Justified.

Label 6: Signal Input

There are four stereo inputs in the section. Please input stereo audio signal, as music or sine wave.

Label 7: Reset

All I/O pins are reset to default values.

Label 8: LED Indicator

The LEDs indicate the chip status and IR received status. It keeps on a light state when the MS6821 is active. The other

hand, keeps on a dark state when the MS6821 is power-off. It is red-dark blink once when the MCU has received the

function code correctly.

8

7

1

2

3

6

5

4