Configure BT1120 through VOUT[0] on DM8168

Omin Chou

Dear all,

I want to use below pins as VOUT through BT1120. Can anyone help me to confirm those pins are suitable or not? Then the related registers need to set for BT1120 mode. Can anyone guide me to configure that? Thanks in advance.

B.R.

over 13 years ago

0 HardikShah over 13 years ago

TI__Mastermind 20245 points

Hi,
Yes these pins are ok for driving BT1120 in embedded sync. clk pin is not visible here. Further for discrete sync you need to get out hsyn, vsync, fid, DE signals.

Regards,

Hardik Shah

0 Omin Chou over 13 years ago in reply to HardikShah

Genius 3555 points

Hi Hardik,

Thanks for your confirmation. I want to use DM8168 to connect DM8168 through BT1120. Can you help me to confirm the conjunctive method wheter is ok or not? Thanks.

B.R.

0 Steve Clynes over 13 years ago in reply to Omin Chou

TI__Mastermind 43875 points

Yes, this will work but as Hardik mentioned I would also connect the H & V syncs so that you can send full range data across the link.

When using embedded syncs your data can only range from 16 thru 235.

When using discrete syncs your data can be full range 0 thru 255.

What is the actual data you are sending across the link?

BR,

Steve

0 Omin Chou over 13 years ago in reply to Steve Clynes

Genius 3555 points

Dear Steve, Hardik,

Thanks for your confirmation.

But I do not clear on this string "connect the H & V syncs so that you can send full range data across the link." Can you explain more details about the meaning of full range? Thanks in advance.

B.R.

0 Steve Clynes over 13 years ago in reply to Omin Chou

TI__Mastermind 43875 points

ITU1120 does not use discrete syncs so they use some of the 16 bit data codes to indicate synchronization information.

This is done by using byte channel codes 0 thru 15 and 236 thru 255 cannot be used for video information and are used to convey synchronization information.

If you use discrete syncs then the byte channels can carry data values of 0 thru 255.

BR,

Steve

0 Omin Chou over 13 years ago in reply to Steve Clynes

Genius 3555 points

Hi Steve,

It is very clear to me. Thank you so much for your detailed explanation.

B.R.

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Configure BT1120 through VOUT[0] on DM8168