Mipi / CSI2 interfacing - how long can the cable be?

[Blarp]

I need to place a Cmos sensor (720p HD content @ 25 fps or better)
away from the processor interface. I might use the OV538 sensor.

I have no hands-on experience with mipi, I gather it is a LVDS like
serialized signal. Connections are usually made over short flexifoils.

Question: when using e.g. cat5 grade twisted pair(s), how long can I
expect a cable to be before signals are degraded and / or RFI problems
arise?

Input welcome - thanks!

 

[Wolfgang F. Gaerber]

Am 25.01.2011 17:06, schrieb Blarp:

I need to place a Cmos sensor (720p HD content @ 25 fps or better)
away from the processor interface. I might use the OV538 sensor.

I have no hands-on experience with mipi, I gather it is a LVDS like
serialized signal. Connections are usually made over short flexifoils.

Question: when using e.g. cat5 grade twisted pair(s), how long can I
expect a cable to be before signals are degraded and / or RFI problems
arise?

Input welcome - thanks!

Typicalwise, the camera interface consists of a parallel bus (8lines and
more), a horizontal and vertical sync line and a pixel clock.
Additional there are I2C lines to configure the camera SoC - and
normally there is some master clock provided from the mainboard.
Masterclock - est. 13Mhz
Pixelclock + Datalines >50MHz !!! (asymmetric) with 720p/25fps

I would say 2 inch using some wiring - and 20 inch using matched
impedance flatfoil connection.
Due to the fact that there are no differential signals - using twisted
pair makes no sense.
For everything else(longer) they invented HDMI;-)))

rgds.

Wolfgang