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TAS5548 Datasheet(PDF) 65 Page - Texas Instruments |
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TAS5548 Datasheet(HTML) 65 Page - Texas Instruments |
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65 / 120 page  CLK_Gen Control LRCK1 SCK1 SDIN1 SDIN2 8ch PWM Modulator + HP-PWMOUT 32kHz–192kHz Input 4ch ASRC Fixed 96kHz Output 32 bits Data Path 48 bits Accumulator 1365 Cycles Fixed Processing DAP 10 Channel Input Mixer 8 Channel Processing 8 Channel Output Mixer 32kHz–192kHz Input 4ch ASRC Fixed 96kHz Output Serial Audio Receiver 4ch 2 Stereo Serial Audio Receiver 4ch 2 Stereo LRCKO/LRCKIN2 SCKO/SCKIN2 SDIN3 SDIN4 4ch 4ch Serial Audio Receiver Transmitter 1 Stereo SDOUT/SDIN5 I/ O I O I I I I I I/ O I/ O MCLKO/PSVC OSC 12.288MHz 8ch O O O O O O O O O I O 2ch 2ch Bypass mode 2ch HPPWM PWM8 PWM7 PWM6 PWM5 PWM4 PWM3 PWM2 PWM1 TAS5548 www.ti.com SLES270 – NOVEMBER 2012 9.2 Serial Port Master/Slave Configurations The inputs to the Digital Audio Processor (DAP) come from the Asynchronous Sample Rate Converter block as follows: Figure 9-3. Digital Audio Signal Flow Block Diagram The DAP can feed audio data to and from the Serial Audio ports in the following manner. There are 3 main use cases: 1. Use Case 1: External Karaoke Microphone Input (ADC in on SDIN5) or External I2S Subwoofer (a) SDIN1 through 4 are slave to an external source (such as a media decoder IC). (b) A separate DOUT (for Sub) or Microphone Inout (SDIN5) needs to function at the post-ASRC rate. (c) Therefore, the device is configured to use MCLKO, SCLKO and LRCLKO. 2. Use Case 2: Mixing two different data sources (e.g. Stereo Bluetooth I2S and CD/Media Decoder (a) In an example where two different data sources need mixing, SDIN1/2 run at a different rate than SDIN3/4 (b) SCLKIN-2 and LRCLKIN-2 are used to provide an LRCLK and SCLK for the second data synchronous data source. (c) DOUT (for a wireless sub) cannot be used in this mode, as no MCLKO, SCLKO or LRCLKO are available. 3. Use Case 3: Creating an external loop for processing (e.g. using a TAS3108 or TAS3152 I2S processor) (a) SDIN1/2 run with SCLK and LRCLK as a slave. (b) SDOUT acts as a "send for external processing", in master mode, synchronized to MLCKO, SCLKO, LRCLKO (c) SDIN3/4 Act as a "return from external processing", in master mode, synchronized to MLCKO, SCLKO, LRCLKO Copyright © 2012, Texas Instruments Incorporated Application Recommendations / Settings 65 Submit Documentation Feedback Product Folder Links: TAS5548 |
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