CS42L50 Datasheet, PDF (23/48 Pages) Cirrus Logic – Low Voltage, Stereo CODEC with headphone Amp

CS42L50
4.1.19 Clip Detection Status (address 07h)
7
RESERVED
0
6
RESERVED
0
5
RESERVED
0
4
RESERVED
0
3
RESERVED
0
2
RESERVED
0
1
CLIP_L
0
0
CLIP_R
0
Default = 0 (No clipping detected)
Function:
The Clip Flags indicate when there is an over-range condition anywhere in the CS42L50 internal signal
path. These bits are “sticky”. They constantly monitor the ADC signal path and are set to 1 when an over-
range condition occurs. They are reset to 0 when read.
4.2 DAC (Address = 0010001)
4.2.1 Power and Muting Control (address 01h)
7
AMUTE
1
6
SZC1
1
5
SZC0
0
4
POR
1
3
PDNHP
0
2
PDNLN
0
1
PDN
1
0
CP_EN
0
4.2.2 AUTO-MUTE (AMUTE)
Default = 1
0 - Disabled
1 - Enabled
Function:
The Digital-to-Analog converter output will mute following the reception of 8192 consecutive audio sam-
ples of static 0 or -1. A single sample of non-static data will release the mute. Detection and muting is
done independently for each channel. The quiescent voltage on the output will be retained and the Mute
Control pin will go active during the mute period. The muting function is affected, similar to volume control
changes, by the Soft and Zero Cross bits in the Power and Muting Control register.
4.2.3 SOFT RAMP AND ZERO CROSS CONTROL (SZC)
Default = 10
00 - Immediate Change
01 - Zero Cross Digital and Analog
10 - Ramped Digital and Analog
11 - Reserved
Function:
Immediate Change
When Immediate Change is selected all level changes will take effect immediately in one step.
Zero Cross Digital and Analog
Zero Cross Enable dictates that signal level changes, either by attenuation changes or muting, will occur
on a signal zero crossing to minimize audible artifacts. The requested level change will occur after a
timeout period of 512 sample periods (10.7 ms at 48 kHz sample rate) if the signal does not encounter a
zero crossing. The zero cross function is independently monitored and implemented for each channel.
DS544PP1
23