TVP5151 firmware patch

William Wyatt-Millington

Other Parts Discussed in Thread: TVP5151

Checking that firmware v01.A2 patch for TVP5151 in supporting Square Pixel mode is providing 768 pixels per row. I understand that I will need to change the clock to 29.5 MHz to support Square Pixel mode.

over 12 years ago

0 Steve Clynes over 12 years ago

TI__Mastermind 43875 points

- NTSC: 24.5MHz, PAL: 29.5MHz

BR,

Steve

0 William Wyatt-Millington over 12 years ago in reply to Steve Clynes

Prodigy 70 points

Hi Steve

That is what I expected and at a 29.5 MHz clock rate there will be 768 pixels per row.

0 William Wyatt-Millington over 11 years ago in reply to William Wyatt-Millington

Prodigy 70 points

Hi Steve

I have received following statement from the engineeer implementing the design:

"Input video decoder chip appears to accept the firmware update via I2C as the version number can be read back, but it does not generate any VSync"

Has anyone else had a similar issue.

0 Steve Clynes over 11 years ago in reply to William Wyatt-Millington

TI__Mastermind 43875 points

I have not heard of any issues, but to be honest square pixel is not used by many people.

According to the firmware patch notes you should receive stable syncs even when there is no input signal, so I think something else might be wrong here.

Are you getting a good stable output pixel clock?

Are you able to switch the crystal and check that a regular NTSC/PAL signal locks? Try with no patch download too.

BR,

Steve

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TVP5151 firmware patch

- NTSC: 24.5MHz, PAL: 29.5MHz