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XTALP/XTALN of ADV7182A has no signal output.

Category: Software
Product Number: ADV8172A

Dear:

The signal of AIN1 is CVBS(N/P).XTALP/XTALN of ADV7182A has no signal output.


adv7182a_write(&I2cInst_adv7182a,0x0F,0x80);
usleep(10000);
adv7182a_write(&I2cInst_adv7182a,0x0F,0x00);
adv7182a_write(&I2cInst_adv7182a,0x52,0xCD);
adv7182a_write(&I2cInst_adv7182a,0x00,0x00);
adv7182a_write(&I2cInst_adv7182a,0x0E,0x80);
adv7182a_write(&I2cInst_adv7182a,0x9C,0x00);
adv7182a_write(&I2cInst_adv7182a,0x9C,0xFF);
adv7182a_write(&I2cInst_adv7182a,0x0E,0x00);
adv7182a_write(&I2cInst_adv7182a,0x17,0x41);
adv7182a_write(&I2cInst_adv7182a,0x03,0x0C);
adv7182a_write(&I2cInst_adv7182a,0x04,0x07);
adv7182a_write(&I2cInst_adv7182a,0x13,0x00);
adv7182a_write(&I2cInst_adv7182a,0x1D,0x40);

  • Hi,

    The 28.63636 MHz crystal (Y1) on the evaluation board does not oscillate until the ADV7182A is configured (see the Configuring the Evaluation Board section).
    So, in order to get XTALP/XTALP output first configure the Evaluation board as mentioned in the technical documentation attached below.
          Refer Page No 8: EVAL-ADV7182AEBZ (Rev. 0) (analog.com)
    If you are receiving Differential CVBS then you should configure AIN1 as shown below.
     
    Thanks,
    Dharani S
  • Dear:

              I am debugging on the schematic designed by myself.Can I config this IIC to make XTALP/XTALN clock out?

              adv7182a_write(&I2cInst_adv7182a,0x0F,0x80);
              usleep(10000);
              adv7182a_write(&I2cInst_adv7182a,0x0F,0x00);
              adv7182a_write(&I2cInst_adv7182a,0x52,0xCD);
              adv7182a_write(&I2cInst_adv7182a,0x00,0x00);
              adv7182a_write(&I2cInst_adv7182a,0x0E,0x80);
              adv7182a_write(&I2cInst_adv7182a,0x9C,0x00);
              adv7182a_write(&I2cInst_adv7182a,0x9C,0xFF);
              adv7182a_write(&I2cInst_adv7182a,0x0E,0x00);
              adv7182a_write(&I2cInst_adv7182a,0x17,0x41);
              adv7182a_write(&I2cInst_adv7182a,0x03,0x0C);
              adv7182a_write(&I2cInst_adv7182a,0x04,0x07);
              adv7182a_write(&I2cInst_adv7182a,0x13,0x00);
              adv7182a_write(&I2cInst_adv7182a,0x1D,0x40);

              If it’s wrong, could you please give me the IIC initialization code of configuration output?

                                                                                                                                                thank you.

  • Hi,

    Please refer the below updated script file of ADV7182 for configuring and IIC initialize code.
    Please refer the below thread for assistance if required.
     
    Thanks,
    Dharani S
  • Dear Dharani S:

                              Thank you very much. Your reply has solved my problem very well.

                                                                                                                          thank you.