Reduce the noise on CSI pin by the RT1060

[ZHOU_XIAO]

Hello, all

Customer(Panasonic) wants to reduce the noise on the pin  of 「IOMUXC_GPIO_AD_B1_05_CSI_MCLK」by decline the drive strength by following two methods?

1. By setting the appropriate Rdrv impedance value  

2 To change the prescaler of CSI_MCLK. The current prescaler is 1/2, and customer wants to change the prescaler to decline the strength of drive.

How about the two method?

@lucas_cao 

Best regars

ZHOU

[lucas_cao]

Hi Zhou，

Does the noise here means RE noise? Could you pleae check this with customer?

if yes, i think the first question can be used. But i don't think the second one can reduce RE result.

[ZHOU_XIAO]

Hello, @lucas_cao 

Does the noise here means RE noise? Could you pleae check this with customer?

→Yes.   The customer means RE(radiated emission) . They concerns about the RE of  the CSI MCLK.  and want to reduce the RE noise.

Currently , they measure the pin of CSI MCLK.

Although the power supply is 3.3 V , the amplitude of the CSI MCLK is about   -1.8 V ~~ 5.1V.

Do you have any comments about the  big the amplititude of -1.8 V ~~ 5.1V?

Best regards

ZHOU

[lucas_cao · Accepted solution]

Reduce the Drive strength values in pad settings will help on this.