MS6821_1 Datasheet, PDF (18/29 Pages) MOSA ELECTRONICS – 4 Stereo Inputs, 2W BTL Stereo Output 16-bit Stereo DAC and Volume Control

MOSA
MS6821
4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control
Input Selector and Input Gain
MSB
1
0
1
0
LSB
0
1 ^{G2 G1 G0 S1 S0}
0
0
0
1
1
0
1
1
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Initial state: L-ch1, R-ch1, Input gain is 0dB.
Function
L-ch, Input Gain and line Selection
R-ch, Input Gain and line Selection
Line 1 (L-ch or R-ch)
Line 2 (L-ch or R-ch)
Line 3 (L-ch or R-ch)
Line 4 (L-ch or R-ch)
0 dB
3 dB
6 dB
9 dB
12 dB
15 dB
18 dB
21 dB
Power Down Mode
MSB
LSB
Function
1
1
0
DAC
PD
RPD
LPD
PDPR
CAP
PD
Power mode selection and power management
0
DAC is active mode
1
DAC is power down mode
0
R-ch PA output is active mode
1
R-ch PA output is power down mode
0
L-ch PA output is active mode
1
L-ch PA output is power down mode
0
Disable preparation for power off
1
Enable preparation for power off
0 Set the voltage of CAP to middle of supply voltage
1 Pull down CAP pin to ground
Initial state: All are the power down modes.
Enable the power down preparation before the chip will be shut down.
REV 3
18/29
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