Manual

56 DS792F2

CS43L22

Confidential Draft

3/4/10

7.26.3 PCMx Overflow (Read Only)

Indicates the over-range status in the PCM data path.

7.27 Battery Compensation (Address 2Fh)

7.27.1 Battery Compensation

Configures automatic adjustment of the speaker volume when VP deviates from VPREF[3:0].

7.27.2 VP Monitor

Configures the internal ADC that monitors the VP voltage level.

Notes:

1. The internal ADC that monitors the VP supply is enabled automatically when BATTCMP is enabled, re-

gardless of the VPMONITOR setting. Conversely, when BATTCMP is disabled, the ADC may be en-

abled by enabling VPMONITOR; this provides a convenient battery monitor without enabling battery

compensation.

2. When enabled, VPMONITOR remains enabled regardless of the PDN bit setting.

PCMxOVFL PCM Overflow Status:

No digital clipping has occurred in the data path of the PCM (“PCM Channel x Volume” on page 47) of the

DSP.

1 Digital clipping has occurred in the data path of the PCM of the DSP.

Application: “DSP Engine” on page 21

76543210

BATTCMP VPMONITOR Reserved Reserved VPREF3 VPREF2 VPREF1 VPREF0

BATTCMP Automatic Battery Compensation

0 Disabled

1 Enabled

Application: “Maintaining a Desired Output Level” on page 27

VPMONITOR VP ADC Status

0 Disabled

1 Enabled