MOSA

MS6821

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

REV 3

28/29

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.