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Automatic identification problem by tvp7002

Mr cai
Prodigy 210 points
Other Parts Discussed in Thread: TVP7002

hei,everyone!

 I met a problem: set up different resolution to Read the line per Frame Status and  the clocks per line status is the same.

The following is  the configuration data and read out the value:

1280x720 0x00 0x00
EVM1280x720
I2C (0x5d): 0x03 = 0xa0
I2C (0x5d): 0x07 = 0x28
I2C (0x5d): 0x0e = 0x50
I2C (0x5d): 0x2c = 0x50
I2C (0x5d): 0x48 = 0x00
I2C (0x5d): 0x49 = 0x00
I2C (0x5d): 0x01 = 0x66
I2C (0x5d): 0x02 = 0x30
I2C (0x5d): 0x44 = 0x6f
I2C (0x5d): 0x45 = 0x05 
I2C (0x5d): 0x46 = 0xfa
I2C (0x5d): 0x47 = 0x1e
I2C (0x5d): 0x17 = 0x12
I2C (0x5d): 0x40 = 0x90
I2C (0x5d): 0x41 = 0x00
I2C (0x5d): 0x42 = 0x62
I2C (0x5d): 0x43 = 0x06
read tvp7002 !!!!!!!!!!!!
I2C (0x5d): 0x14 = 0xb7
wh wv
I2C (0x5d): 0x3b = 0x02
I2C (0x5d): 0x3c = 0x05
fv fh
I2C (0x5d): 0x37 = 0x65
I2C (0x5d): 0x38 = 0x24
I2C (0x5d): 0x39 = 0x60
I2C (0x5d): 0x3a = 0x00

The image is showed:

Hope to get help,thank you very much!

  • 0
    TI__Mastermind 43875 points

    What resolutions have you tried in order to check that the counters are changing?

    If you are using the internal 6MHz reference then there are some resolutions which will return the same values since there is not enough resolution with a 6MHz reference to uniquely distinguish all VESA compatible modes.

    You can switch to an external reference clock (27MHz recommended since it is often available in video systems) which will then allow more accurate h-sync/time measurements.

    BR,

    Steve