DS90UB940N-Q1: CSI-2 indirect registers map for FS and FE settings

jaglaz

Part Number: DS90UB940N-Q1

Hello,
I have to change the settings for Frame Start and Frame End timings, I know that they can be changed by the 0x0C and 0x0D Frame Gap registers , I'd like to know what are individual bits in these registers responsible for to set optimal values.

regards,

Jaglaz

over 5 years ago

0 Charley Cai over 5 years ago

TI__Genius 12866 points

Hi Jaglaz,

Could you point me to where you see the Frame Gap register?

Best Regards,

Charley Cai

0 jaglaz over 5 years ago in reply to Charley Cai

Prodigy 40 points

Hello,
Im unable to point to it - I dont see it anywhere, I just saw someone mention it on these forums. I know it exists, but I dont know its description.

Best regards,
Jaglaz

0 Charley Cai over 5 years ago in reply to jaglaz

TI__Genius 12866 points

Hi Jaglaz,

I found the ticket you are referring to. Please allow me a few days to find out about this since the register is currently not available on the datasheet.

Best Regards,

Charley Cai

0 Charley Cai over 5 years ago in reply to jaglaz

TI__Genius 12866 points

Hi Jaglaz,

Sorry this is taking a little longer than usual. I am still checking on these register settings.

Best Regards,

Charley Cai

0 jaglaz over 5 years ago in reply to Charley Cai

Prodigy 40 points

Hello Charley,
don't worry, I'm not moving anywhere.

Kind Regards,
Jaglaz

0 Charley Cai over 5 years ago in reply to jaglaz

TI__Genius 12866 points

Hi Jaglaz,

The value in Frame Gap registers 0x0C and 0x0D are used as multiplier with the parameter tLPX.

The minimum Frame Gap is 1 and the maximum Frame Gap is 0xFFFF.

Frame_Gap x tLPX will set the time between FE and FS.

From the datasheet, the tLPX is ~50ns.

Best Regards,

Charley Cai

0 jaglaz over 5 years ago in reply to Charley Cai

Prodigy 40 points

Hello Charley,
the rules, according to which the Frame Gap is set, are indeed correct, however the tLPX seems to be different (113ns in my case), I must have unintendedly changed it.

Kind Regards,
Jaglaz

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DS90UB940N-Q1: CSI-2 indirect registers map for FS and FE settings