Dear All,
Hello.
Refer to Figure 37-16. Sensor Image Frames in IMX6DQRM(Rev.2).
I think that Frame B and Frame C are same meaning.
What is difference of Frame B and C?
(I couldn't find the skip setting like skipped rows and skipped columns between Frame B and C.)
Best Regards,
Keita
Solved! Go to Solution.
Figure 37-16 relates to general considerations, when horizontal line
consist of the following periods :
- back porch ;
- active data ;
- horizontal blank.
In some sense You are right : for situation when HSYNC is used as DE signal
for active data, back porch and horizontal blank periods are not defined.
Regards,
Yuri.
From the RM : “The virtual frame A starts with the VSYNC
signal. After vertical blanking starts frame B. The HSYNC
signal indicates boundaries of the frame B. The frame B includes
both the active sensor frame C and horizontal blanking intervals”.
So, difference between frame B and frame C is horizontal blanking
interval.
Have a great day,
Yuri
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Dear Yuri,
Hello. Thank you for your reply.
My understanding was HSYNC must set low for horizontal blanking intervals from below community.
https://community.freescale.com/message/483801?et=watches.email.thread#483801
So, I considered that the HSYNC signal indication (frame B) is same as Frame C.
Best Regards,
Keita
Timings for frames B and C are not the same. This is reflected in the RM.
Regards,
Yuri.
Dear Yuri,
Hello.
Sorry, I couldn't understand why frames B and C are not the same.
"The HSYNC signal indicates boundaries of the frame B."
I consider that the HSYNC signal indicates the active sensor frame C because HSYNC must set low for horizontal blanking intervals.
Best Regards,
Keita
Figure 37-16 relates to general considerations, when horizontal line
consist of the following periods :
- back porch ;
- active data ;
- horizontal blank.
In some sense You are right : for situation when HSYNC is used as DE signal
for active data, back porch and horizontal blank periods are not defined.
Regards,
Yuri.
Dear Yuri,
> In some sense You are right : for situation when HSYNC is used as DE signal for active data, back porch and horizontal blank periods are not defined.
OK. Thanks Yuri.
It's my understanding.
- Gated Clock mode (Not use DE signal) --> Frame B = Frame C
- Use Data Enable signal --> Frame B != Frame C
Best Regards,
Keita
Strictly speaking, the i.MX6 Datasheet(s) does not contain (require) timing specs between
HSYNC, VSYNC and data, therefore we cannot say exactly if horizontal blank = 0
for the gated mode.
Regards,
Yuri.
Hi Yuri,
Thank you for your reply.
Let me confirm again.
In case of Gated Clock mode:
I consider that Start point of Frame B is same one of Frame C.
Best Regards,
Keita