DS90UB954-Q1: DS90UB954's CSI0_THS_PREP&CSI0_THS_ZERO parameter

user6259789

Part Number: DS90UB954-Q1

Hi team,

We have three questions to ask:

1.What are the units of device DS90UB954 register CSI0_THS_PREP(Indirect Address Page 0x00; Register 0x44) &CSI0_THS_ZERO(Indirect Address Page 0x00; Register 0x45)?

2.If i set the register CSI0_THS_PREP =0x86/CSI0_THS_ZERO = 0x8c, what is the actual Ths-prep/Ths-zero output？

3.Are there any points to note when setting CSI0_THS_PREP & CSI0_THS_ZERO or need to cooperate with setting other registers?

Best regards,

Alec Li

over 5 years ago

0 Jiashow Ho over 5 years ago

TI__Genius 11340 points

HI Alec,

May I ask why you're trying to change those values? We don't recommend changing the CSI timing as this can lead to CSI errors on the SoC.

0 user6259789 over 5 years ago in reply to Jiashow Ho

Prodigy 230 points

Hi Jiashow

The chip at the next level needs to be configured with these parameters to decode correctly.

The chip in the next level has a range requirement for these two parameters, so we want to reconfigure it.

Best regards,

Alec Li

0 Jiashow Ho over 5 years ago in reply to user6259789

TI__Genius 11340 points

Hi Alec,

In theoretically, one count of the CSI_THS_PREP and CSI_THS_ZERO should be equal to 1/(CSI-2 clock / 8). However, the analog delays are not all calibrated out. It is better to measure it on the scope.

Best,

Jiashow

0 user6259789 over 5 years ago in reply to Jiashow Ho

Prodigy 230 points

Hi Jiashow

Thanks for your reply.

Best,

Alec

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DS90UB954-Q1: DS90UB954's CSI0_THS_PREP&CSI0_THS_ZERO parameter