cs42l52 Cirrus Logic, Inc., cs42l52 Datasheet - Page 72

• Manufacturer Part Number: cs42l52
• Description: Low-power, Stereo Codec W/ Headphone & Speaker Amps
• Manufacturer: Cirrus Logic, Inc.

72
6.37.3 VP Reference
6.38
6.38.1 VP Voltage Level (Read Only)
6.39
6.39.1 Speaker Current Load Status (Read Only)
Reserved
VPLVL7
7
7
VP Battery Level (Address 30h) (Read Only)
Speaker Status (Address 31h) (Read Only)
Sets the desired VP reference used for battery compensation.
Indicates the unsigned VP voltage level.
Indicates whether or not any of the speaker outputs is shorted to ground.
VPREF[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Application:
VPLVL[7:0]
...
0101 1110
...
0111 0010
...
Formula:
SPKxSHRT
0
1
Reserved
VPLVL6
6
6
Desired VP used to calculate the required attenuation on the speaker output:
1.5 V
2.0 V
2.5 V
3.0 V
3.5 V
4.0 V
4.5 V
5.0 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 33
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
Speaker Output Load
No overload detected
Overload detected
SPKASHRT
VPLVL5
5
5
SPKBSHRT
VPLVL4
4
4
5/13/08
(for VA = 1.8 V)
(for VA = 2.5 V)
SPKR/HP
VPLVL3
3
3
Reserved
VPLVL2
2
2
Reserved
VPLVL1
1
1
CS42L52
Reserved
VPLVL0
DS680F1
0
0