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TAS2552EVM

uMin
Intellectual 860 points
Other Parts Discussed in Thread: TAS2552EVM, TAS2552, BT-MSPAUDSINK-RD

Hi,

I am experimenting with the TAS2552EVM. Audio source is from windows media player on a PC via USB interface. The TAS2552 is programmed with the included I2S script comes with the GUI s/w.  I have the following observations:

  1. While the the audio is being played, TAS2552 will shut down when the audio output has reached certain power.  Is it because the output current has exceeded the iLIM ?  In the datasheet, it never mentions what happen when the output current exceeds the iLIM, whether it cuts off the output or clip the output.  Can we disable this current limit function ?

  2. Is this iLIM sensed at the I/V sense block as shown in page 13 of the datasheet dated Feb 2014 ?

Thanks,

CM.

  • 0
    TI__Guru**** 189399 points

    Hi, CM,

    I have asked my colleague to work on you with this issue.

    -d2

  • 0 in reply to Don Dapkus
    Intellectual 860 points

    Thanks Don.  Awaiting your colleague's response.

    I have further question, and hope he/she can also help.

    On the EVM, I connect Vbat to 5V and play a 400Hz pure sine wave tone. I use a DSO to probe at the speaker (8 ohm) terminals.  I slowly increase the volume until TAS2552 shuts down.  The output voltage across the speaker terminals is ~6Vpp just before it shuts down.  I calculate the output power as follows:

    Vrms = 6V / sqrt 2 = 4.2V

    Power = V2 / R =  (4.2)2 / 8 = 2.2W

    Also Power = I*R, therefore I = 2.2 / 4.2 = 0.525A.

    What can we change so that the output power can reach 4W ?

    Thanks,

    CM.

  • 0 in reply to uMin
    Intellectual 860 points

    Hi,

    I am able to get the 4W power now. The previous issue was due to long wire / loose connection on Vbat.

     

    My customer bought the BT-MSPAUDSINK-RD (BT and MSP430 Audio Sink Reference Design).  They want to connect the I2S signal from this BT/MSP reference design to TAS2552EVM, so that music can be streamed from a mobile phone, and hear the output from the TAS2552EVM.

    I followed the following instruction (2) from the TAS2552EVM user guide:

    and connect these 4 lines from the BT/MSP board to TAS2552EVM:

    • AUD_CLK    -->  BCLK
    • AUD_FSYNC  -->  LRCLK
    • AUD_OUT    -->  DIN
    • GND        -->  GND

    I use an DSO to probe on the TAS2552EVM side and can see that the I2S data being sent out from BT/MSP430 board correctly.  It is in DSP data format with 16-bit data for Left channel and followed by 16-bit data for Right channel.  The BCLK is 3.06Mhz, LRCLK (or FSync) is 48.3kHz.

     However, when I set to DSP mode in TAS2552 registers, I cannot get any sound out from TAS2552, .  I also tried I2S, LJF, RJF format and varying the Word Len and Frame Len, but still no sound is heard.  Attached is the register setting used.  

    6281.Reg - DSP mode.txt 
    addr, addr, data, data, 7, 6, 5, 4, 3, 2, 1, 0, description


0,    0x00, 32,   0x20, 0, 0, 1, 0, 0, 0, 0, 0,  Device Status Register


1,    0x01, 16,   0x10, 0, 0, 0, 1, 0, 0, 0, 0,  Configuration Register 1


2,    0x02, 234,  0xEA, 1, 1, 1, 0, 1, 0, 1, 0,  Configuration Register 2


3,    0x03, 93,   0x5D, 0, 1, 0, 1, 1, 1, 0, 1,  Configuraton Register 3


4,    0x04, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  DOUT Tristate Mode


5,    0x05, 4,    0x04, 0, 0, 0, 0, 0, 1, 0, 0,  Serial Interface Control Register 1


6,    0x06, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  Serial Interface Control Register 2


7,    0x07, 200,  0xC8, 1, 1, 0, 0, 1, 0, 0, 0,  Output Data Register


8,    0x08, 32,   0x20, 0, 0, 1, 0, 0, 0, 0, 0,  PLL Control Register 1


9,    0x09, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  PLL Control Register 2


10,   0x0A, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  PLL Control Register 3


11,   0x0B, 109,  0x6D, 0, 1, 1, 0, 1, 1, 0, 1,  BatteryGuard Inflection Point Register


12,   0x0C, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  BatteryGuard Slope Control Register


13,   0x0D, 190,  0xBE, 1, 0, 1, 1, 1, 1, 1, 0,  Limiter Level Register


14,   0x0E, 8,    0x08, 0, 0, 0, 0, 1, 0, 0, 0,  Limiter Attack Rate and Hystersis Time


15,   0x0F, 4,    0x04, 0, 0, 0, 0, 0, 1, 0, 0,  Limiter Release Rate


16,   0x10, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  Limiter Integration Count Control


17,   0x11, 2,    0x02, 0, 0, 0, 0, 0, 0, 1, 0,  PDM Configuration Register


18,   0x12, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  PGA Gain Register


19,   0x13, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  Class-D Edge Rate Control Register


20,   0x14, 15,   0x0F, 0, 0, 0, 0, 1, 1, 1, 1,  Boost Auto-Pass Through Control Register


21,   0x15, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


22,   0x16, 8,    0x08, 0, 0, 0, 0, 1, 0, 0, 0,  Version Register


23,   0x17, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


24,   0x18, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


25,   0x19, 220,  0xDC, 1, 1, 0, 1, 1, 1, 0, 0,  VBAT Data Register


26,   0x1A, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


27,   0x1B, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


28,   0x1C, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


29,   0x1D, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


30,   0x1E, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


31,   0x1F, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


32,   0x20, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


33,   0x21, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


34,   0x22, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


35,   0x23, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


36,   0x24, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


37,   0x25, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


38,   0x26, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


39,   0x27, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


40,   0x28, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


41,   0x29, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


42,   0x2A, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


43,   0x2B, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


44,   0x2C, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


45,   0x2D, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


46,   0x2E, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


47,   0x2F, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


48,   0x30, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


49,   0x31, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


50,   0x32, 236,  0xEC, 1, 1, 1, 0, 1, 1, 0, 0,  reserved


51,   0x33, 9,    0x09, 0, 0, 0, 0, 1, 0, 0, 1,  reserved


52,   0x34, 199,  0xC7, 1, 1, 0, 0, 0, 1, 1, 1,  reserved


53,   0x35, 110,  0x6E, 0, 1, 1, 0, 1, 1, 1, 0,  reserved


54,   0x36, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


55,   0x37, 105,  0x69, 0, 1, 1, 0, 1, 0, 0, 1,  reserved


56,   0x38, 40,   0x28, 0, 0, 1, 0, 1, 0, 0, 0,  reserved


57,   0x39, 200,  0xC8, 1, 1, 0, 0, 1, 0, 0, 0,  reserved


58,   0x3A, 47,   0x2F, 0, 0, 1, 0, 1, 1, 1, 1,  reserved


59,   0x3B, 201,  0xC9, 1, 1, 0, 0, 1, 0, 0, 1,  reserved


60,   0x3C, 88,   0x58, 0, 1, 0, 1, 1, 0, 0, 0,  reserved


61,   0x3D, 152,  0x98, 1, 0, 0, 1, 1, 0, 0, 0,  reserved


62,   0x3E, 69,   0x45, 0, 1, 0, 0, 0, 1, 0, 1,  reserved


63,   0x3F, 31,   0x1F, 0, 0, 0, 1, 1, 1, 1, 1,  reserved


64,   0x40, 29,   0x1D, 0, 0, 0, 1, 1, 1, 0, 1,  reserved


65,   0x41, 166,  0xA6, 1, 0, 1, 0, 0, 1, 1, 0,  reserved


66,   0x42, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


67,   0x43, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


68,   0x44, 183,  0xB7, 1, 0, 1, 1, 0, 1, 1, 1,  reserved


69,   0x45, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


70,   0x46, 128,  0x80, 1, 0, 0, 0, 0, 0, 0, 0,  reserved


71,   0x47, 32,   0x20, 0, 0, 1, 0, 0, 0, 0, 0,  reserved


72,   0x48, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


73,   0x49, 128,  0x80, 1, 0, 0, 0, 0, 0, 0, 0,  reserved


74,   0x4A, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


75,   0x4B, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


76,   0x4C, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


77,   0x4D, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


78,   0x4E, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


79,   0x4F, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


80,   0x50, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


81,   0x51, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


82,   0x52, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


83,   0x53, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


84,   0x54, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


85,   0x55, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


86,   0x56, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


87,   0x57, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


88,   0x58, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


89,   0x59, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


90,   0x5A, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


91,   0x5B, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


92,   0x5C, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


93,   0x5D, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


94,   0x5E, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


95,   0x5F, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


96,   0x60, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


97,   0x61, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


98,   0x62, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


99,   0x63, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


100,  0x64, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


101,  0x65, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


102,  0x66, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


103,  0x67, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


104,  0x68, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


105,  0x69, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


106,  0x6A, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


107,  0x6B, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


108,  0x6C, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


109,  0x6D, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


110,  0x6E, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


111,  0x6F, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


112,  0x70, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


113,  0x71, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


114,  0x72, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


115,  0x73, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


116,  0x74, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


117,  0x75, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


118,  0x76, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


119,  0x77, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


120,  0x78, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


121,  0x79, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


122,  0x7A, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


123,  0x7B, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


124,  0x7C, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


125,  0x7D, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


126,  0x7E, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved


127,  0x7F, 0,    0x00, 0, 0, 0, 0, 0, 0, 0, 0,  reserved

    Any advice on how to make TAS2552EVM to decode the I2S data from the BT/MSP correctly ?

    Thanks,

    CM.

  • 0 in reply to uMin
    Intellectual 860 points

    Hi,

    some updates.

    After setting the IOVDD-SEL jumper correctly to 1.8V, the streamed audio now can be heard, but it is with a lot of noise.  I have adjusted the PLL parameters based on the following equation, so that P=0, J.D is around 16.0000, for  BCLK = 3.06Mhz, & FSync = 48.3kHz..

    But still, no clean sound can be heard, no matter how I adjust the J.D values, as well as the Bit length, Word length, Offset etc..  Even though the status register shows no errors.

    I would appreciate if there is any suggestion to allow the streamed audio from the BT/MSP AudioSink board to be output correctly from TAS2552EVM.  Following is the register setting I programmed into TAS2552.

    # Slave Reg Value
    w 80 03 1D
    w 80 04 04
    w 80 05 04
    w 80 06 00
    w 80 07 C0
    w 80 08 0F
    w 80 09 25
    w 80 0A D8
    w 80 0B 8F
    w 80 0C 80
    w 80 0F 04
    w 80 10 00
    w 80 11 02
    w 80 12 00
    w 80 13 40
    w 80 14 00
    w 80 0D C0
    w 80 0E 28
    w 80 02 EE
    w 80 01 10

    Thanks,

    CM.