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Hi,
that all depend son your system-settings.
You said, your Clocked-Video-Output runs at 44.8MHz. This is the outgoing clock of the CVO? So the CVO is configured with two clock domains? The (let's call it) Stream-Clock and the Video-Clock. Right?
What color plane setting do you have? All transmitted in parallel, or in sequence? What are the burst-settings of the Frame-Reader? How wide is the Frame-Reader-Memory-Interface and is it clocked with the DDR-Clock or with the Avalon-Clock?
The minimum frequency depends on the settings of the Color-Plane-Sequencer.
The only question I could answer without knowing more about your system-setup is the question regarding the clock domains:
-All IPs you connect with Avalon Stream, in your case the whole pipeline have to have the same clock for their streaming-ports. In your case variable is the Clock for the Memory-Interface of the Frame-Reader and the outgoing clock of the CVO.
So please give us more details on what you need, and what you have build yet.
Kind regards
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Thank you for taking the time to reply.
I was going to add screen shots but I don't know how. Anyway,
vip_vfr is configured as follows:
Bits per color planes 8
Planes in parallel 3
Number of colors in sequence 1
Image width 970
Image height 720
Master port width 32
FIFO depth 1024
Read master FIFO burst target 64
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vip_itc:
Width 970
Height 720
Bits per pixel 8
Color planes 3
Parallel transmission format
Video in and out use the same clock NO (just discovered this option)
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All IPs share a 44.8Mhz clock for now. This is probably wrong and I am
going to have to add a PLL and a vip_cpr. Why should I have a vip_cpr?
Thanks,
S.
Honored Contributor
