2*2W @4
Ω
PAM8803 Class-D Audio Amplifier Board
Note:
SLEEP means that the chip works with low power consumption. MUTE means
that the chip normally works with no output.
2.6 Volume Control Settings
On-board 2-slide DIP switches marked as “SW3” is used for volume control. K1 is used
to set volume and K2 used to set the SHDN of the chip.
FIGURE 2-13 VOLUME CONTROL SETTINGS (AA-AB32131)
TABLE 2-7 VOLUME CONTROL SETTINGS (AA-AB32131)
Volume Control Settings
K1 Function
ON
Disable the tactile switches
OFF
Enable the tactile switches for volume control
Note:
When K1 is ON, the chip will amplify the audio signal with 4dB gain and the tactile
switches are disabled.
2.7 Volume Control
Two kinds of control input are provided to control volume: on-board tactile switches and
external rotary encoder control daughter board interface.
©
2004-2010 Sure Electronics Inc
AA-AB32131&AA-AB32133_Ver1.0_Page 12
