topic Re: Number of cycles needed to send a single pixel in RAW (Bayer) 12bit in i.MX Processors

Number of cycles needed to send a single pixel in RAW (Bayer) 12bit

ko-hey — Mon, 07 Sep 2015 11:13:22 GMT

Hi all

I have a question about number of cycles needed to send a single pixel.

According to RM Rev3.0, there are following description.

How about RAW Bayer 12bit ?

Is it need 2 cyles/pixel ?

Ko-hey

Re: Number of cycles needed to send a single pixel in RAW (Bayer) 12bit

igorpadykov — Mon, 07 Sep 2015 11:37:44 GMT

Hi Ko-hey

for RAW Bayer 12bit it is 1 cycle/pixel

Best regards

igor

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Re: Number of cycles needed to send a single pixel in RAW (Bayer) 12bit

ko-hey — Mon, 07 Sep 2015 11:55:21 GMT

Hi Igor

Thank you for reply but please let me confirm again.

According to the P2724 of RM Rev 3.0, there is a following description.

Bayer/Generic data = 1 cycle/pixel

However, in P2725 of RM Rev 3.0, there is a following description

Generic data = 2 cycle/pixel

Both of above description, I guess there have different parameters.

Could you check again ?

Ko-hey

Re: Number of cycles needed to send a single pixel in RAW (Bayer) 12bit

igorpadykov — Mon, 07 Sep 2015 12:14:51 GMT

Hi Ko-hey

according to i.MX6DQ Datasheet (rev.4, 7/2015)

Table 66. Camera Input Signal Cross Reference, Format, and Bits Per Cycle

5,6 selection, it is 1 cycle.

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6DQCEC.pdf

~igor

Re: Number of cycles needed to send a single pixel in RAW (Bayer) 12bit

ko-hey — Tue, 08 Sep 2015 10:01:45 GMT

Hi Igor

I understand that the Generic data needs only 1 cycle from following description.

YCbCr, 16 bits-Supported as a "generic-data" input-with no on-the-fly processing.

Is this also same for RAW Bayer 12bit ?

Addition for this , is it same in both parallel and MIPI-CSIs I/F ?

Ko-hey

Re: Number of cycles needed to send a single pixel in RAW (Bayer) 12bit

igorpadykov — Tue, 08 Sep 2015 11:12:54 GMT

Hi Ko-hey

according to RM for MIPI 1 cycle/pixel is for YUV422

2 cycle/pixel is for RAW (generic) format

Best regards

igor

Re: Number of cycles needed to send a single pixel in RAW (Bayer) 12bit

ko-hey — Wed, 09 Sep 2015 02:18:51 GMT

Hi Igor

This is final confirm.

The following is the my understanding.

Is it correct ?

In parallel interface, Generic data needs 1 cycle/pixel

In MIPI-CIS2 interface, Generic data needs 2 cycle/pixel

I'm sorry for asking you many times.

But the cycle is very important for me.

Ko-hey

Re: Number of cycles needed to send a single pixel in RAW (Bayer) 12bit

igorpadykov — Wed, 09 Sep 2015 02:28:13 GMT

Hi Ko-hey

yes this is right.

Best regards

igor

Re: Number of cycles needed to send a single pixel in RAW (Bayer) 12bit

ko-hey — Thu, 10 Sep 2015 01:20:42 GMT

Hi Igor

Thanks !

Ko-hey