We are planning to implement HDMI receiver port on our system using ADV7611.
Can anyone advice whether I can use ISC port of SAMA5D series processor to
interface the RGB output lines of ADV7611?
I am not familiar with the ISC port on this processor. The output formats the ADV7611 can supply are defined in the datasheets. The output can be in various bus styles and in RGB color space. The ADV7611 will output continuous data streams including the blanking areas and some processor inputs only expect active video. You need to compared the 2 parts side by side.
Sorry Its a typo. Basically its ISI interface I.e. image sensor interface .So I wanted to know can I connect output of ADV7611 to image sensor interface of any processor or MCU and receive the video data ?
Initial I would say yes, If you set it up for ITU.656, YCbCr 422 8-bit bus it should work. Looking at the Atmel part the IS bus is only 12 bits so you cannot input RGB directly into the part. Fortunately the 7611 can convert RGB8:8:8 sources into YCbCr 422 ITU.656 8-bit bus.
Thanks GuenterL for the response.
One point,as we go through the datasheet ADV7611 can support 12-bit ITU-R BT.656 4:2:2 YCrCb also, so don't you think we can use 12-bit of IS bus for connecting it to ADV7611 and configure it accordingly.
Yes, you could but why. The processor is is going to cut it down to 565 for the display anyways, just fewer lines to run.
Further to my question I want to choose between interfacing either HDMI to parallel or HDMI to MIPI converter chip to iMX6. Can any one suggest the which approach is better in term of availability of Linux driver and hardware implementation?
Can you provide me the connection diagram for connecting ADV7611 to 8-bit camera sensor interface of any processor?
Can some one suggest me the proposed EMI filtering for ADV7611 ? What type of emi filter we should use on power supplies .Should we go for T-type LC filter (as used in evaluation board) or can we go with using simple ferrite bead as per the document " HDMI_RX_PowerSupplies_RevA_050411%20" .
Regarding power supply filtering I've use Murrata NFM21PC105B1A3D. From the curve stand point this performs as well as a ferrite bead, however it is smaller and easier to manufacture with. The key goals of power rail filtering is to keep an aggressor noise from a source and power rail from coupling into the target power rail. For the ADV7611 this is especially important for PVDD. It is also important how the layout is done and selecting cap values such that their Qs don't overlap. I would start by looking at the ADV7612-7511 reference platform to see how there.
Thanks GuenterL for the prompt response.
One more question there is a heat sink mounting option given on in the evaluation board PCB layout. How important is it to keep heat sink on ADV7611?
We do not have a suggested heat sink mounting option. If you follow the standard layout recommendations and keep the board within specified temp. ranges you should be OK.
One more question relates to the power auppy filtering. In the reference schematic ADV7612-7511, there is one inductor added in addition to the EMI component on each supply. Do we need to add that also?
The inductor is the ferrite bead. It becomes part of the LC filter.
The EMI filter with inductor is there for ADV7511 but for ADV7612 only EMI filter is connected which as per you is NFM21PC105B1A3D. So for ADV7611 should I Connect only EMI filter NFM21PC105B1A3D on each power supply like PVDD ,CVDD, DVDD, TVDD etc.
Check out the reference schematic for the EVAL-ADV7612-7511 board
Advantiv™ EVAL-ADV7612-7511 Video Evaluation Board
Each rail has an EMI filter/inductor followed by the 10uF and several 100nF and 10nF caps. The EMI filter can be used as is or replace with the NFM.... part.
I have checked the same reference schematic and found that for power rails of ADV 7612 there is one EMC filter connected on each power rail but for ADV7511 there is one EMC filter and one inductor connected for each power rail.
So should I follow the ADV7612 path and connect one NFM part suggested by on each power rail and move ahead?
OK. I mis-understood your question about the inductor. The EMI filter has a different curve then the LC filter (inductor/cap) has. When chain together they work better in the original chip evaluation board. This design originally came from an evaluation board schematic and just followed on through to this board. With good layout it should be sufficient to just use the NFM... part along with normal decoupling caps. You have to keep in mind the noise generated by the source source. Switchers will be noisier while LDO sources are best.
We are using power adapter as main power supply and then using LDO ,we are generating 3.3V and 1.8V.
I found that for both power rail at the input of EMC filters and output of each EMC filter there are big electrolytic capacitor , are these capacitors necessary or can we use a single electrolytic at the output of each LDO i.e. for 1.8V and 3.3.V LDOs and then after EMC filter I can use simple decoupling cap of say 0.1uF.
You should use ceramics on the LDO outputs. Electrolytic caps have poor performance when filtering out noise.
What about large value ceramic capacitor of 10uf at the output of each EMC filter as given in the reference schematic. Are they necessary? or putting one large ceramic capacitor (10uF) at the out put of both the LDOs (1.8V and 3.3V) and adding 0.1 uf at the out put of EMC filter along with a 10nf at each pin (say of CVDD) is good enough ?
Our recommended design is to use a 10uF ceramic right after the EMI filter or inductor, then place sets of 100nF plus 10nF as close to the pin as possible with the 10nF being the closest. The number of 100 + 10nF sets is dependent on how close power rail pins are to each other and other layout factors. If there is only one power pin then one set will suffice. If there are 2 power pins on opposite sides of the chip then you will need 2 sets. The goal of all this is to create the deepest Q possible for each pin by combining various cap sizes.
Thanks for the support GuenterL.
one more question regarding the interfacing, where to connect HSYNC, VSYNC, and DE of ADV7611 in iMX6UL
I am not familiar with the iMX6 however I believe it can handle input BT.656 streams and since the timing is embedded in the stream you do not need to connect H, V or DE up to the processor. Just leave them open. I'd bring them out to a test point because they will still have valid timing on them.
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