MOSA

MS6821

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

REV 1.0

25

www.mosanalog.com

SE mode and BTL mode operation

The headphone controls operational mode. System enters SE mode when headphone jack is empty.

When a set of headphone plugged into the jack, the system switched to BTL mode.

IR Controller

Power ON/OFF : The power key.

Press the key once to set power-on or power-off for MS6821.

IN1~IN4 : Analog input channel.

Press the key once to select input channel.

The default state is IN1.

VOL+, VOL- : The volume control keys.

The volume control in 1.25dB/step as the switch is pressed once, the range is –77.5dB to 0dB.

The default value is -20dB.

Gain+, Gain- : The gain control keys.

The gain control in 3dB/step as the switch is pressed once, the range is 0dB to 21dB.

The initial value is 0dB.

Mute : The mute key

Press the key once to set mute-on or mute-off.

The default state is mute-off.

PD/Active : The power down key.

Press the key once to set power-down or activation for MS6821.

Mix_LR ON/OFF : The mixing DAC signal keys.

Mix_L ON, mixed the left channel of DAC with the left channel of input signal.

Mix_R OFF, unmixed the right channel of DAC with the right channel of input signal.

I2S, LJF, RJF: The digital input format keys.

There are three formats can be selected that is I2S, Left justified and Right justified.