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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Mar 09, 2013 4:50 am Post subject: Datasheet for CXA2181q |
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Anyone got a datasheet for this or know the pinout and capability?
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Sat Mar 09, 2013 9:04 am Post subject: |
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Hi,
From which Sony device is this? Maybe I'll have its service manual and we'll find out more...
Regards,
barclay66
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flipdog
Joined: 22 Dec 2011
Posts: 156
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| Posted: Sat Mar 09, 2013 2:38 pm Post subject: |
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..
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flipdog
Joined: 22 Dec 2011
Posts: 156
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| Posted: Sat Mar 09, 2013 3:06 pm Post subject: |
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Another version. Note orientation.
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Sat Mar 09, 2013 4:00 pm Post subject: |
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OK, so basically it is an input selector (4 inputs) and sync processng circuit, controlled via I2C bus...
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sun Mar 10, 2013 2:57 am Post subject: |
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Thanks!! Ill check those out better when i get on my computer next. Its in an LG LCD television, at a glance it looks to be connected to the component video inputs, so i was thinking if it puts out RGB i might be able to use it to make a component and RGB switch box.
Im using a phone at the moment, so its hard to look. Do you think it will be possible to do this?
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Sun Mar 10, 2013 9:25 am Post subject: |
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In short: No.
You would need to know its I2C command set but this doesn't seem to be available on the web. And You would need some kind of controller issuing those commands to it. If the LCD TV is still functional You could monitor the I2C communication in order to find out what's being sent to it when it should switch to another onput (just an example). Quite a lot of research, but if You want it to do then I would recommend using the "Bus Pirate" (serial communication sniffer) for it. It's a nice and inexpensive tool...
Regards,
barclay66
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Mar 11, 2013 9:17 pm Post subject: |
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Thanks mate 
I dont have the time for that sort of task really.
Do you know of any chips i can use to go from RGB to component video? I usually use a CXA1645 for RGB to s-video, but not sure what chip to use for component.
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Mar 12, 2013 10:05 am Post subject: |
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Awesome!
Thanks very much Barclay!
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Mar 18, 2013 5:24 pm Post subject: |
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Sorry Gabor i missed your reply til now.
Very interesting!! I will have to read up more and see about putting one together.
Basically what i want to do with this is make a circuit that will take the 15.75kHz RGB-S signal from both game consoles and arcade boards, then output that signal in component video. 24kHz ability would also be very good, as it would allow later game boards to functionvia component.
Im not making this for my own benefit cause i can use RGB directly, but for many others that dont have the space for a CRT and still want top quality images from genuine retro gaming consoles and arcade machines.
You can buy one online that does this, but depending on where you live, it can be very expensive, and im aiming to help those that can do it themselves.
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Mar 18, 2013 10:18 pm Post subject: |
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Now, I see. The LMH1251 what I suggested does the other way, the input is component (Y/Pb/Pr) the output is RGB, so it is not for your purpose.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Mar 19, 2013 10:37 pm Post subject: |
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Yep i was just coming back here to tell you that!! 
Thanks mate
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