D435i - IPS Chipset & RGB Module connection datasheet
I'm currently using the D4 Image processor (MU82645DES_S_LM6B) & D430 in my PCB design and just about to add in the BMI055 IMU. I noticed that the ISP chipset (RTS5845) is ridiculously hard to come by (as is the datasheet) when searching for it online. I was wondering if there is a more readily available alternative/recent version that we could use instead?
My other question is regarding the OV2740 used in the RGB colour sensor, where might I find the datasheet with pin connections for the right side pin connector (on the D4 Image processor board) so I can connect the OV2740.
I know in another thread (linked below) it was suggested to use the I-PEX 20708-050E & then have it connect directly into an I-PEX 20708-024E via an interposer and then you could connect the T150 and IMU on it to the 24 pin connector.
However the difference in my design is that I'm not using the 20708-050E but instead using the 20708-024E to connect directly to the camera and instead have the IMU on my main PCB. So I'd like to know what pins from the OV2740, BMI055 & RTS5845 I'm connecting to the D4 Image processor & vice versa to the other parts, as this information isn't readily available in the 2019 datasheet.
Also is the anywhere to get a hold of the gasket used for the securing the OV2740 in place? I noticed on the teardown image of the D435i that there was a metal gasket which you could screw into the heatsink.
Previous question asking about RGB sensor: https://support.intelrealsense.com/hc/en-us/community/posts/360033350654-DS5-RGB-Module-purchasable?input_string=D435i%20-%20IPS%20Chipset%20%26%20RGB%20Module%20connection%20datasheet
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Bosch have their own data sheet for the IMU component used in the D435i (and also in the T265).
https://www.mouser.com/ds/2/783/BST-BMI055-DS000-08-786482.pdf
Although the component is apparently capable of an acceleration range up to 16g, RealSense caps it at 4g. The higher the g value, the less sensitive it becomes. Dorodnic the RealSense SDK Manager said that they may make the range configurable someday, though it was unlikely to be implemented soon.
https://github.com/IntelRealSense/librealsense/issues/3991#issuecomment-493068366
Intel have special configurations of RealSense camera that are not available for retail purchase by the general public. One of these is a 'D430i', which sounds like a D430 depth module with an IMU. Though it sounds as though this would not be suited to how you want to connect the IMU to your product.
The pin-outs for the second connector on the Vision Processor D4 are available in the January 2018 edition of the 400 Series data sheet, in the Tracking Module section on pages 50-55. The tracking module section was removed from the data sheet after March 2018 when the T150 Tracking Module component intended for the connector was retired by Intel.
https://www.rutronik.com/fileadmin/Micropages/Intel/Intel_RealSense_D400_Series_Datasheet.pdf
The gaskets in builds by system integrators are usually self-supplied custom components, such as 3D-printed ones. The data sheet provides specifications and leaves it to system integrators to design solutions for parts such as gaskets and custom imager cover materials that are based on the specs but adapted to the integrator's specific product needs (for example, using Corning Gorilla Glass for the cover material).
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Hi Marty,
Cheers for the reply, I already have the datasheet for the BMI055, I'm not buying the RGB module as I know its documented as the OmniVision OV2740 on Pages 33-36 of the Realsense 2019 datasheet.
I'm building my own version of the D435i using the D430 module, same IMU & same colour sensor as depicted in the 2019 Realsense 400 series datasheet, this is because I'm working with a smaller form factor than if I were to use the packaged D435i. What I'm personally after is as to what pins on the D4 Image processor do I need to connect the IMU & OV2740 to as this is not clear in the datasheet.
I did search for RTS8545 using the search term 'realtek RTS5845' before and yes it lists results; however when you click on these sites and then try to find the datasheet it will redirect you to the website alldatasheet.net which states that the RTS5845 datasheet does not exist. -
Above is the current schematic I have for the D4 Image processor board this includes everything minus the 20708-024E connector, IMU & the RTS5845.
The big chip is what represents the D4 Image processor & as you can see there are many pins still available and referring back to my question, I wish to find out which of these available pins do I need to connect to the IMU, OV2740 & the RTS5845. -
I tried searching for the RTS5845 datasheet myself and ended up going in circles and getting nowhere too, unfortunately.
I have been all over the old pin-out list from the January 2018 data sheet. I have to conclude that the technical details are probably only available to customers who register a Non Disclosure Agreement (NDA) with Intel. If you let me know whether you are in the US or in an EMEA country (Europe, Middle East and Africa) then I could link you up to the appropriate Intel person to start you on the NDA registration process, if you want deeper access to technical data.
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Just a quick update, I have managed to find the Pin information for the 20709-024E & the RTS5845 at the bottom of the 2018 datasheet where it lists the pin information for the connector and the RTS5845; however I'll need to find the datasheet for the RTS5845 in order to know where to put those pins on the RTS5845
I will get back to you witihn the hour with an update as to what I might need still.
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Okay so everything regarding the 20709-024E I have got it all connected up. I think there was a spelling mistake in the datasheet when it refers to the 50 pin 20709-050E with regards the 020709-024E connector they ask to be connected to pin 25 for EGPIO[5] because that leads to the NC pin which of course isn't meant to be connected.
Also I think there is a spelling mistakes because pins RGB_FSYNC/RGB_STROBE from the 20709-050E state that these are not used for connecting to the 20709-024E despite later in the datasheet saying you have to connect them
What I can't find out is whether I need to use the SDA/SCL & SPI Serial data output for the BMI055 I'm assuming I don't need them and can simply used the Interupt pins for the accelerometer & gyro and that be it as I can't find any other information depicting this to not be the case in the datasheet.
I think minus the issues above, the only thing I now require is he datasheet for the RTS5845 so I can then connect up all of the COLOR_ISP pins on the D4 Image processor to the RTS5845 and as the datasheet doesn't tell me which pins I need to connect these connections to, I just better hope that intel has the RT5845 datasheet or my contact on Alibaba is able to provide me with one. -
Hi MartyG,
I'm afraid I've been having a lot of difficulty in locating the Realtek RTS5845 datasheet.
I've tried contacting wholesalers over Alibaba who sell the product and they don't have the information.
I've also tried contacting Realtek directly regarding the RTS5845 & their newest model (which I only found out) the RTS5875.
Both times my emails have been ignored by Realtek which is severely delaying my product's release date.
Seeing as Intel used the RTS5845 in their design, could you find out for me if the engineers have the datasheet for the RTS5845? Or could perhaps tell me what the pins are & the dimensions of the RTS5845 chipset? As this is getting quite frustrating now. If it requires an NDA, I will sign it, so long as I can get the damn datasheet.
Kind Regards,
Marc Brooks -
I didn't have any further success with locating a datasheet for the RTS5845 or the RTS5875. I also went thoroughly through the datasheets again, going back to their earliest editions.
I am starting to wonder if the RTS5845 ISP is unique to the Vision Processor D4 Board, rather than the alternative separate-components version of the D4. The data sheet says that the ISP's role is to provide a better-quality image by compensating for inherent inaccuracy in lens and sensor. It does not say that the ISP is a compulsory component. This theory is strengthened by a list of the signals that go to the ISP, that says they can be connected to the D4 Board, OR not have anything connected to it ('No Connect').
Nevertheless, I can make an Intel internal inquiry about the ISP if you still want the information.
On the data sheet's system block diagram, the ISP is linked to the color sensor, which is an optional component (only the D415 Depth Module board has an integrated RGB sensor and it is attached separately by cable on all other models). So it would make sense that you could leave out the ISP if a color sensor was not included in the camera build.
Another option to consider may be what some hardware modders do, such as putting videogame consoles in a handheld format. They rearrange a PCB for a smaller space by cutting the PCB into pieces and making connections between the sections by cable instead of having circuit-lines on the board. So in theory, you might be able to cut a D4 Board in half and stack the board sections vertically to save internal space, connected by a cable. I'm not sure of the legality of doing that with a D4 Board in a commercial product (though Intel are extremely flexible in regard to implementation of RealSense hardware in system integrators' own products).
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Hi MartyG,
If you could do an internal inquiry that would be most appreciated.Part of wonders if it is a unique part to the Vision Processor D4 Board but when I can see multiple manufacturers selling both parts that also make me rather suspicious, As they can't simply all be selling to directly towards the Vision Processor D4 board otherwise why would they make all the other parts of the D4 board available for purchase.
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Update: the manager at Intel Support got back to me and said that if I forward his email address to you then he will help you to get an NDA signed first if you get in touch with him.
The best way to keep both his and your email addresses private would be to leave your email address in a comment below and then immediately edit out the address afterwards. I should get the email address in my email box notification even if it is no longer in the forum message.
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I received your message - thanks so much!
I will email you the contact email for the Intel Support manager. Please email the questions that you sent me to him, as he is the best person to answer it. I'll mail you back a copy of the text of your questions to make sure you don't lose it and can copy it on to him. Thanks!
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Hi MartyG,
Just giving an update on things & this will be my last update. I just had a lovely call with one the support team members to discuss an NDA, I am now under one and have access to everything I need plus more. I do now have access to the full board schematic.
Things I can say: The schematic I previously posted is the most I'm allowed to post up about the D4 Image processor circuit board.
What I can't say: I can't post up what pins they use to connect to the Realtek RTS5845 & Winbond* W25X10CL but I do know this information now.
I can't disclose the individual's email addresses for security, should anyone want this information please send a message to MartyG who can put you in touch with the right people.
From there they may grant you an NDA to access this information (Providing the information you supply warrants one).
Additionally they can also provide you with the contacts with Realtek should you wish to use the RTS5845 in your design (I was provided these contacts before an NDA was in place) - As you will notice if you try to contact Realtek directly, they will not respond to any emails.
Please note in order for Realtek to take you seriously, you need to give them your sales figures (be it solid or predicted) & be willing to go under a NDA before they will disclose any information regarding the datasheets.
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Thanks very much for the detailed update, Marc!
I spoke with Miro (your contact) at length yesterday regarding NDA sign-ups and was given some policy clarification. Not every situation is appropriate to grant an NDA for, and an especial consideration is the 'return on investment' that a company may bring to Intel in exchange for a partnership. An example of this would be a volume exceeding 100,000.
Another test of suitability is whether a company is able to source parts and datasheets on their own without Intel's involvement. For technical information on any part made by a third-party company (such as Realtek or OmniVision), system integrators should contact those companies and not Intel. This is similar to something that Nintendo did with potential licensees in the mid Eighties, challenging them to prove themselves by working out how to program Nintendo hardware without the assistance of any manuals.
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