SLAS831D March 2014 – March 2018 PCM1860 , PCM1861 , PCM1862 , PCM1863 , PCM1864 , PCM1865
PRODUCTION DATA.
Depending on the application, users may not want to link input channels, however, for the majority of stereo input applications, its strongly recommended to set the system to track gain across inputs, to maintain balance.
The auto PGA clipping suppression control has the settings shown in Table 3.
REGISTER NAME | REGISTER LOCATION | USAGE | VALUES |
---|---|---|---|
AGC_EN | Pg0 0x05 | Enable auto gain control | 0: Disable (Default)
1: Enable |
CLIP_NUM[1:0] | Pg0 0x05 | Start auto gain control after detects CLIP_NUM times of ADC sample clips | 0: 80
1: 40 2: 20 3: 10 (Default) |
MAX_ATT[1:0] | Pg0 0x05 | Maximum automatic attenuation | 0: –3 dB (Default)
1: –4 dB 2: –5 dB 3: –6 dB |
DPGA_CLIP_EN | Pg0 0x05 | Enable clipping detection after the digital PGA. Note that digital PGA is post ADC, meaning that there is a short delay before clipping is detected. | 0: Disable (Default)
1: Enable |
LINK | Pg0 0x05 | Link all channels together if dealing with stereo sources to maintain balance. | 0: Independent control (Default)
1: Ch1[R]/Ch2[L]/Ch2[R] follow Ch1[L] PGA value. |
SMOOTH | Pg0 0x05 | Enable smooth transition from step to step (zero crossing). | 0: Immediate change
1: Smooth change (default) |