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TAS2557 – Echo Reference on DOUT2

TAS2557 – Echo Reference on DOUT2. Applications Engineering – Low Power Audio & Actuators. Echo Reference – Device Setup. By default, echo reference is sent to both DOUT1 and DOUT2 For this test, TAS2557 was configured for default values through PPC3

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TAS2557 – Echo Reference on DOUT2

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  1. TAS2557 – Echo Reference on DOUT2 Applications Engineering – Low Power Audio & Actuators

  2. Echo Reference – Device Setup • By default, echo reference is sent to both DOUT1 and DOUT2 • For this test, TAS2557 was configured for default values through PPC3 • Then ASI2 was enabled and configured as Slave: w 98 00 00 w 98 7f 00 w 98 00 01 w 98 41 01 01 15 01 • Biquad 1 was modified to show processed data on DOUTx • Hardware connections are shown in the next slide

  3. Test Setup AP Digital Interface Input AP Digital Interface Output TAS2557 AP Master ASI1 Slave BCLK WCLK DIN DOUT MCLK BCLK WCLK DIN DOUT AP Master ASI2 Slave ASI2 ASI1

  4. Test Results DIN DOUT1 DOUT2

  5. Echo Reference – Device Setup • By default, echo reference is sent to both DOUT1 and DOUT2 • For this test, TAS2557 was configured for default values through PPC3 • Then ASI2 was enabled and configured as Master: w 98 00 00 w 98 7f 00 w 98 00 01 w 98 21 04 81 81 31 w 98 41 12 11 15 01 • Biquad 1 was modified to show processed data on DOUTx • Hardware connections are shown in the next slide

  6. Test Setup AP Digital Interface Input AP Digital Interface Output TAS2557 AP Master ASI1 Slave BCLK WCLK DIN DOUT MCLK BCLK WCLK DIN DOUT AP Slave ASI2 Master ASI2 ASI1 (Bticino/Legrand preferred solution: AP Slave ASI1 Master) (Bticino/Legrand preferred solution: AP Master ASI1 Slave)

  7. Test Results DOUT2

  8. Echo Reference – Device Setup • By default, echo reference is sent to both DOUT1 and DOUT2 • For this test, TAS2557 was configured for default values through PPC3 • Then ASI2 was enabled and configured as Slave: w 98 00 00 w 98 7f 00 w 98 00 01 w 98 41 01 01 15 01 • Biquad 1 was modified to show processed data on DOUTx • Hardware connections are shown in the next slide

  9. Test Setup AP Digital Interface Input TAS1020B onboard TAS2557 TAS1020B Master ASI1 Slave BCLK WCLK DIN DOUT MCLK BCLK WCLK DIN DOUT AP Master ASI2 Slave ASI2 ASI1

  10. Test Results Output Measurement: Elevated THD+N readings Attenuation in measurement Inaccurate frequency reading Input Digital Signal: 1kHz sinewave, Full-scale

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