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CS4237B Datasheet(PDF) 66 Page - Cirrus Logic |
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CS4237B Datasheet(HTML) 66 Page - Cirrus Logic |
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66 / 114 page  3D Space and Center (C2) Default = 00000000 D7 D6 D5 D4 D3 D2 D1 D0 SPC3 SPC2SPC1 SPC0CTR3CTR2CTR1CTR0 CTR3-CTR0 SRS processed "Center" gain term. The least significant bit represents 1.5 dB attenuation, with 0000=0 dB. See Table 24. When 3DM is on, this value is forced to 0000. SPC3-SPC0 SRS processed "Space" gain term. The least significant bit represents 1.5 dB attenuation, with 0000=0 dB. See Table 24. When 3DM is on, this value is forced to 0010. 3D Enable (C3) Default = 000xxxxx D7 D6 D5 D4 D3 D2 D1 D0 3DEN 3DM 3DSO res res res res res res Reserved. Must write 0. Could read as 0 or 1. 3DSO 3D Serial Output. When set, SDOUT data comes from the DAC inputs which includes 3D effects. Typically used when CSPE in C4 is set and determines the data used on the Consumer Serial Port output pin. 0 - The output is from the ADCs. 1 - The output is from the SRS DSP. 3DM 3D Mono Enable. When set, the SRS Mono-to-Stereo DSP is enabled. (3DEN must also be enabled). This allows a mono signal to be SRS processed into a pseudo stereo im- age. 3DEN 3D Enable. Must be set to enable the SRS 3D Sound DSP. Consumer Serial Port Enable (C4) Default = 0000xxxx D7 D6 D5 D4 D3 D2 D1 D0 CSPE CSBR U V res res res res V The Validity bit in a sub-frame of digital audio data. U The User bit in a sub-frame of digital audio data. CSBR Channel Status Block Reset. When set, resets the channel status block boundary. CSPE Consumer Serial Port Enable. When set, the serial port output format, on SDOUT, converts to the consumer standard for digital audio transmis- sion, compatible with the consumer portion of IEC-958. An older version of the standard is also called S/PDIF. Note that the serial port is still enabled using the SPE bit in WSS I16. For more information on the consumer digital audio transmis- sion format see Crystal’s Application Note 22 titled Overview of Digital Audio Interface Data Structures. bit3 bit2 bit1 bit0 Space (SPC3-SPC0) Center (CTR3-CTR0) 00 0 0 0 0.0 dB 0.0 dB 10 0 0 1 -1.5 dB -1.5 dB 20 0 1 0 -3.0 dB -3.0 dB 30 0 1 1 -4.5 dB -4.5 dB .. . . . -- 81 0 0 0 -12.0 dB -12.0 dB .. . . . -- 12 1 1 0 0 -18.0 dB -18.0 dB 13 1 1 0 1 -19.5 dB -19.5 dB 14 1 1 1 0 -21.0 dB -21.0 dB 15 1 1 1 1 -22.5 dB -22.5 dB Table 24. SRS 3D Sound Control DS213PP4 CS4237B 66 |
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