question on configuration of TVP5147

Vaishnavi,

You have the correct register settings for 20-bit mode.  Not sure what's causing the problem.

Are using the TVP5147 or TVP5147M1?

Which patch are you using?

Do you have a pull-down resistor on pin 69?

Regards,

Jim

Hi Jim,

         I'm using TVP5147M1. I am not working in linux. I am working in windows Code Composer studio environment. I am developing CCS diagonostic code for testing TVP5147M1. There is a pull down resistor on pin 69. We are working in 16 bit mode. So, the two LSB's C0 and C1 are not used by us.

The register settings what I am using for 20 bit mode are:

  reg 00h --> 05, reg 08h --> 00, reg 0Eh --> 04, reg 33h --> 41, reg 34h --> 11, reg 35h --> 6F, reg 36h --> AF, reg 37h --> 55, reg 38h --> 55.

If I use the above settings, I can see the data in Y lines but not in the C lines. If I probe the C lines, C9 is always high and the other pins are low (0V). Also,I know that C_X functions are available only in 10 bit mode. To verify whether they act as GPIO or output lines, I used that settings. Can you please help me in solving this issue?

Thanks and Regards

Vaishnavi                        

Vaishnavi,

To select 16-bit mode, you should only need to write 41h to register 33h.

Please check bit 3 of register 3Ah to verify that the C-PLL is locked to the color subcarrier.

Please check bit 3 of register 3Bh to verify that color killer is not active.  If so, write 60h to register 05h to disable color killer.

Which TVP5147M1 patch code are you using?

Regards,

Jim