i.MX8MM MIPI-CSI How many MegaPixel cameras can be supported?

[haryanl]

Hi everybody

i.MX8MM MIPI-CSI How many MegaPixel cameras can be supported?

Theoretically, each channel supports up to 1.5Gbps

But in Application Reference Chap 13.1.1.1, the maximum speed was only 5M pixels at 15fps, or 1080p60fps

1. So, Is 5Mpixel, 30fps not supported?

5M*30fps*16bit/pixel= 2.4Gbps (< 1.5Gbx4Lanes)

2. Can I connect i.MX8MM with 8M pixel, or 12M pixel camera?

In the case of 10bit / Pixel, how much frame rate if possible?

Please help,

HaRyanl

[haryanl]

In case I use YUV 8bit with 12Mpixel camera, can I use 30fps?

12Mpixel * 8bit * 30fps * 1.35 = 3.89Gbps (<6Gbps / 4Lanes)

1.35 is "blanking intervals"

[joanxie]

no, I don't think so

YUV422 over 8 bit = 2 cycles/pixel

so 12M* 20FPS*1.35*2*8BIT>6G, you can use YUV422 over 16 bit = 1 cycle/pixel

[haryanl]

So can I use 15fps with 12M 8bit YUV case?

12M*8bit*15fps*2Cycles*1.35=3.89Gbps

Looking forward to your help

[joanxie · Accepted solution]

yes on theory

[haryanl]

So what is the maximum achievement that NXP has achieved on the EVK board?

How many Megapixels, and how many fps?

[joanxie]

the max bandwidth is up to 4lanes 6Gbps, for the resolution, you can refer to :

13.4.6.1 Image resolution
MIPI CSI Slave block needs the configuration of Image resolution to measure one line
length exactly and detect frame end. Vertical resolution register has 16bits (16’h0001 ~
16’hFFFF) Horizontal resolution register has 16bits (16’h0004 ~ 16’hFFFC).

[haryanl]

Thank for your help

[joanxie]

what data format do you capture? 10bits raw data?

[haryanl]

Hi Joanxie

We are considering connecting with Monochrome RGB 8/10/12bit Sensor

I have attached the datasheet of the 3 sensor types below, please refer to that