Datasheet
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SRC4382
SBFS030C – JANUARY 2006 – REVISED SEPTEMBER 2007
Register 2D: SRC Control Register 1
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
0 TRACK 0 MUTE SRCCLK1 SRCCLK0 SRCIS1 SRCIS0
SRCIS[1:0] SRC Input Data Source
These bits select the input data source for the SRC.
SRCIS1 SRCIS0 Input Source
0 0 Port A (Default)
0 1 Port B
1 0 DIR
1 1 Reserved
SRCCLK[1:0] SRC Reference Clock Source
These bits select the reference clock source for the SRC.
SRCCLK1 SRCCLK0 Reference Clock Source
0 0 MCLK (Default)
0 1 RXCKI
1 0 RXCKO
1 1 Reserved
MUTE SRC Output Soft Mute Function
This bit enables or disables the SRC output soft mute function.
MUTE Mute Function
0 Mute Disabled (Default)
1 Mute enabled; output data set to all zeros.
TRACK SRC Digital Output Attenuation Tracking
This bit enables or disables left and right channel attenuation tracking.
TRACK Output Attenuation Tracking
Tracking Disabled (Default)
0 The Left and Right channel attenuation is programmed separately using registers 0x30 and 0x31,
respectively.
Tracking Enabled
1 The Left channel attenuation setting is also used for the Right channel. The Right channel tracks the Left
channel setting.
Register 2E: SRC Control Register 2
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
0 0 AUTODEM DEM1 DEM0 DDN IGRP1 IGRP0
IGRP[1:0] SRC Interpolation Filter Group Delay
These bits select the interpolation filter group delay by configuring the number of samples which are pre-buffered prior to the re-sampler
function.
IGRP1 IGRP0 Number of Samples Pre-Buffered
0 0 64 Samples (Default)
0 1 32 Samples
1 0 16 Samples
1 1 8 Samples
DDN SRC Decimation Filter/Direct Down-Sampling Function
This bit selects the mode of the decimation function, either true decimation filter or direct down-sampling without filtering.
DDN Decimation Function
0 Decimation Filter (Default)
1 Direct Down Sampling
Note: Direct down-sampling should only be used when the output sampling rate is higher than the input sampling rate. When the output
sampling rate is equal to or lower than the input sampling rate, the Decimation Filter must be used in order to avoid aliasing.
DEM[1:0] Digital De-Emphasis Filter, Manual Configuration
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