CS43L22 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CS43L22' PDF : 66 Pages View PDF
Confidential Draft
3/4/10
7.27.3 VP Reference
Sets the desired VP reference used for battery compensation.
VPREF[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Application:
Desired VP used to calculate the required attenuation on the speaker output:
(for VA = 1.8 V)
1.5 V
2.0 V
2.5 V
3.0 V
3.5 V
4.0 V
4.5 V
5.0 V
(for VA = 2.5 V)
1.5 V
2.0 V
2.5 V
3.0 V
3.5 V
4.0 V
4.5 V
5.0 V
“VP Battery Compensation” on page 27
CS43L22
7.28 VP Battery Level (Address 30h) (Read Only)
7
VPLVL7
6
VPLVL6
5
VPLVL5
4
VPLVL4
3
VPLVL3
2
VPLVL2
1
VPLVL1
0
VPLVL0
7.28.1 VP Voltage Level (Read Only)
Indicates the unsigned VP voltage level.
VPLVL[7:0]
...
0101 1110
...
0111 0010
...
Formula:
VP Voltage
3.0 V (for VA = 2.0 V); apply formula using actual VA voltage to calculate VP voltage.
3.7 V (for VA = 2.0 V); apply formula using actual VA voltage to calculate VP voltage.
VP Voltage = (Binary representation of VPLVL[7:0]) * VA / 63.3
7.29 Speaker Status (Address 31h) (Read Only)
7
Reserved
6
Reserved
5
4
SPKASHRT SPKBSHRT
3
SPKR/HP
2
Reserved
7.29.1 Speaker Current Load Status (Read Only)
Indicates whether or not any of the speaker outputs is shorted to ground.
SPKxSHRT
0
1
Speaker Output Load
No overload detected
Overload detected
1
Reserved
0
Reserved
DS792F2
57
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