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CS43L22 Datasheet(PDF) 57 Page - Cirrus Logic

Part # CS43L22
Description  Low Power, Stereo DAC w/Headphone & Speaker Amps
PDF  66 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS43L22 Datasheet(HTML) 57 Page - Cirrus Logic

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DS792F2
57
CS43L22
Confidential Draft
3/4/10
7.27.3
VP Reference
Sets the desired VP reference used for battery compensation.
7.28
VP Battery Level (Address 30h) (Read Only)
7.28.1
VP Voltage Level (Read Only)
Indicates the unsigned VP voltage level.
7.29
Speaker Status (Address 31h) (Read Only)
7.29.1
Speaker Current Load Status (Read Only)
Indicates whether or not any of the speaker outputs is shorted to ground.
VPREF[3:0]
Desired VP used to calculate the required attenuation on the speaker output:
(for VA = 1.8 V)
0000
1.5 V
0001
2.0 V
0010
2.5 V
0011
3.0 V
0100
3.5 V
0101
4.0 V
0110
4.5 V
0111
5.0 V
(for VA = 2.5 V)
1000
1.5 V
1001
2.0 V
1010
2.5 V
1011
3.0 V
1100
3.5 V
1101
4.0 V
1110
4.5 V
1111
5.0 V
Application:
“VP Battery Compensation” on page 27
7
6
5
432
10
VPLVL7
VPLVL6
VPLVL5
VPLVL4
VPLVL3
VPLVL2
VPLVL1
VPLVL0
VPLVL[7:0]
VP Voltage
...
0101 1110
3.0 V (for VA = 2.0 V); apply formula using actual VA voltage to calculate VP voltage.
...
0111 0010
3.7 V (for VA = 2.0 V); apply formula using actual VA voltage to calculate VP voltage.
...
Formula:
VP Voltage = (Binary representation of VPLVL[7:0]) * VA / 63.3
7
6
5
432
10
Reserved
Reserved
SPKASHRT
SPKBSHRT
SPKR/HP
Reserved
Reserved
Reserved
SPKxSHRT
Speaker Output Load
0
No overload detected
1
Overload detected



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