This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DS90UB927Q-Q1: GPIO_3 didn´t work when paired with DS90UB928Q-Q1

Other Parts Discussed in Thread: DS90UB928Q

Hi,can´t make gpio [3] works in the following config:

SER  0x12 0x6
SER  0xd 0x5
SER  0xe 0x55
SER  0xf 0x3
SER  0x3 0xda
DESER 0x1d 0x3
DESER 0x1e 0x33
DESER 0x1f 0x5
DESER 0x22 0x86

SER  0x7 0x40
SER  0x8 0x40
SER  0x70 0xc8
SER  0x77 0xc8
SER  0x71 0x30
SER  0x78 0x30

GPIO [0,1,2] works fine as output in SER and input in DESER, I2S works with DA.

GPIO[3] is a PWM input in SER and a output in DESER.

thanks

  • Hello-

    What is the PWM signal frequency and levels presented as an input to the 927 GPIO3 pin?

    Regards,
    Davor
  • Hello, the signal is 1KHz 50% duty cycle 3.3V, but i try on/off signal and didn´t work too.

    this is the circuit connected to GPIO3

    thanks

  • Hello-

    It is still not clear from the circuit that the signal reaches the 927 GPIO3 input pin. Can you measure the amplitude of the signal on the 927 GPIO3 pin?

    Regards,
    Davor
  • GPIO 3 input pin on 927 is connected to uC PWM pin output, the signal has 3.3V amplitude 1KHz 50% duty cycle. I also try toggle from 0V to 3.3V at very low frequency and didn´t work.

    thanks.
  • Hello, Could you please provide register dumps for these parts?
    This is unexpected behavior from these parts.
    We are also working to set this up in our lab.
    Thanks
  • Hello, this is the configuration, we also had in DS90UB927q i2S_WC at 32KHz and I2S_CLK at 1MHz this two signal are present all the time.
    thanks.
    ALL values in HEX
    DS90UB927q
    0 28
    1 0
    2 0
    3 da
    4 80
    5 0
    6 58
    7 40
    8 40
    9 0
    a 0
    b 0
    c 1
    d 25
    e 55
    f 3
    10 0
    11 0
    12 6
    13 90
    14 0
    15 0
    16 fe
    17 1e
    18 a1
    19 a5
    1a 0
    1b 0
    1c 0
    1d 1
    1e 0
    1f 0
    20 3
    21 0
    22 25
    23 0
    24 0
    25 0
    26 0
    27 0
    28 0
    29 24
    2a 0
    2b a0
    2c 0
    2d 0
    2e a5
    2f 5a
    30 3
    31 10
    32 0
    33 0
    34 0
    35 0
    36 8
    37 0
    38 0
    39 a
    3a 20
    3b 20
    3c 0
    3d 0
    3e 0
    3f 0
    40 0
    41 0
    42 0
    43 0
    44 0
    45 0
    46 0
    47 0
    48 0
    49 0
    4a 0
    4b 0
    4c 0
    4d 0
    4e 0
    4f 0
    50 20
    51 0
    52 0
    53 0
    54 0
    55 0
    56 0
    57 0
    58 0
    59 0
    5a 0
    5b 0
    5c 0
    5d 0
    5e 0
    5f 0
    60 0
    61 0
    62 0
    63 0
    64 10
    65 0
    66 0
    67 0
    68 0
    69 0
    6a 0
    6b 0
    6c 0
    6d 0
    6e 0
    6f 0
    70 c8
    71 30
    72 0
    73 0
    74 0
    75 0
    76 0
    77 c8
    78 30
    79 0
    7a 0
    7b 0
    7c 0
    7d 0
    7e 0
    7f 0
    80 0
    81 0
    82 0
    83 0
    84 0
    85 0
    86 0
    87 0
    88 0
    89 0
    8a 0
    8b 0
    8c 0
    8d 0
    8e 0
    8f 0
    90 0
    91 0
    92 0
    93 0
    94 0
    95 0
    96 0
    97 0
    98 0
    99 0
    9a 0
    9b 0
    9c 0
    9d 0
    9e 0
    9f 0
    a0 0
    a1 0
    a2 0
    a3 0
    a4 0
    a5 0
    a6 0
    a7 0
    a8 0
    a9 0
    aa 0
    ab 0
    ac 0
    ad 0
    ae 0
    af 0
    b0 0
    b1 0
    b2 0
    b3 0
    b4 0
    b5 0
    b6 0
    b7 0
    b8 0
    b9 0
    ba 0
    bb 0
    bc 0
    bd 0
    be 0
    bf 0
    c0 0
    c1 0
    c2 80
    c3 0
    c4 38
    c5 0
    c6 0
    c7 60
    c8 40
    c9 0
    ca 0
    cb 0
    cc 0
    cd 0
    ce 0
    cf 0
    d0 0
    d1 0
    d2 0
    d3 0
    d4 0
    d5 0
    d6 0
    d7 0
    d8 0
    d9 0
    da 0
    db 0
    dc 0
    dd 0
    de 0
    df 0
    e0 0
    e1 0
    e2 80
    e3 0
    e4 28
    e5 8
    e6 0
    e7 0
    e8 0
    e9 0
    ea 0
    eb 0
    ec 0
    ed 0
    ee 0
    ef 0
    f0 5f
    f1 55
    f2 42
    f3 39
    f4 32
    f5 37
    f6 0
    f7 0
    f8 0
    f9 0
    fa 0
    fb 0
    fc 0
    fd 0
    fe 0


    DS90UB928q
    0 58
    1 4
    2 0
    3 f0
    4 fe
    5 1e
    6 0
    7 28
    8 0
    9 0
    a 0
    b 0
    c 0
    d 0
    e 0
    f 0
    10 0
    11 0
    12 0
    13 0
    14 0
    15 0
    16 0
    17 0
    18 0
    19 1
    1a 0
    1b 0
    1c b
    1d 23
    1e 33
    1f 5
    20 0
    21 0
    22 46
    23 10
    24 8
    25 0
    26 83
    27 84
    28 0
    29 0
    2a 0
    2b 0
    2c 0
    2d 0
    2e 0
    2f 0
    30 0
    31 0
    32 10
    33 25
    34 fa
    35 0
    36 0
    37 0
    38 0
    39 0
    3a 0
    3b 0
    3c 0
    3d a0
    3e 0
    3f 10
    40 43
    41 3
    42 3
    43 0
    44 60
    45 88
    46 0
    47 0
    48 f
    49 0
    4a 0
    4b 8
    4c 0
    4d 0
    4e 63
    4f 0
    50 3
    51 10
    52 0
    53 1
    54 80
    55 0
    56 8
    57 0
    58 0
    59 3f
    5a 20
    5b 20
    5c 0
    5d 0
    5e 0
    5f 0
    60 0
    61 0
    62 0
    63 0
    64 10
    65 0
    66 0
    67 0
    68 0
    69 0
    6a 0
    6b 0
    6c 0
    6d 0
    6e 4
    6f 0
    70 0
    71 0
    72 0
    73 7
    74 7
    75 8
    76 0
    77 0
    78 0
    79 0
    7a 0
    7b 4d
    7c 2
    7d 0
    7e 0
    7f 0
    80 0
    81 0
    82 0
    83 0
    84 0
    85 0
    86 0
    87 0
    88 0
    89 0
    8a 0
    8b 0
    8c 0
    8d 0
    8e 0
    8f 0
    90 0
    91 0
    92 0
    93 0
    94 0
    95 0
    96 0
    97 0
    98 0
    99 0
    9a 0
    9b 0
    9c 0
    9d 0
    9e 0
    9f 0
    a0 0
    a1 0
    a2 0
    a3 0
    a4 0
    a5 0
    a6 0
    a7 0
    a8 0
    a9 0
    aa 0
    ab 0
    ac 0
    ad 0
    ae 0
    af 0
    b0 0
    b1 0
    b2 0
    b3 0
    b4 0
    b5 0
    b6 0
    b7 0
    b8 0
    b9 0
    ba 0
    bb 0
    bc 0
    bd 0
    be 0
    bf 0
    c0 0
    c1 0
    c2 0
    c3 0
    c4 0
    c5 0
    c6 0
    c7 0
    c8 40
    c9 0
    ca 0
    cb 0
    cc 0
    cd 0
    ce 0
    cf 0
    d0 0
    d1 0
    d2 0
    d3 0
    d4 0
    d5 0
    d6 0
    d7 0
    d8 0
    d9 0
    da 0
    db 0
    dc 0
    dd 0
    de 0
    df 0
    e0 0
    e1 0
    e2 0
    e3 0
    e4 0
    e5 0
    e6 0
    e7 0
    e8 0
    e9 0
    ea 0
    eb 0
    ec 0
    ed 0
    ee 0
    ef 0
    f0 5f
    f1 55
    f2 42
    f3 39
    f4 32
    f5 38
    f6 0
    f7 0
    f8 0
    f9 0
    fa 0
    fb 0
    fc 0
    fd 0
    fe 0
  • Thank you for the register data.
    Register 12 bit 2 should not be set to 1. The 927 should be left in the 24 bit mode.
    Thanks