Display on HU

[Quackerspaniel]

I'm new to this so sorry if I piss anyone off. I have a mazda3 and I wanted to change what displays when I turn on the car. Right now it says hello which is wonderful but I figured I wasn't the only one who had thought of this. Has anyone else done this?

 

[icspots]

Lots of people have thought of this ever since the car was introduced. Yes there are some other cars (Scion tC to name one) that you can change this, however the Mz3 is not one of them.

I believe it's something burned into the chips/board when the stereo is constructed. Don't hold me to that explaination, but you'll still have to give up your dreams of turning on your car and having it say "Sit down, Shut up, and Hold on." (that's what I want mine to say) <sigh>

 

[Zero Cool]

Lots of people have thought of this ever since the car was introduced. Yes there are some other cars (Scion tC to name one) that you can change this, however the Mz3 is not one of them.

I believe it's something burned into the chips/board when the stereo is constructed. Don't hold me to that explaination, but you'll still have to give up your dreams of turning on your car and having it say "Sit down, Shut up, and Hold on." (that's what I want mine to say) <sigh>

I have been doing some research on the factory stereo and i found there is a Phillips IC inside that holds all the magic! It actually does quite a lot and is capable of much more then the current programming! I mean MUCH more. like RDS, SRS Surround sound, special Mono to Stereo modes for poor radio reception, Equalizer, Subwoofer outputs, Digital output, etc etc. BUT, it has to be programmed to do so and well. that aint easy.



Zc

 

[Maxx Mazda]

I have been doing some research on the factory stereo and i found there is a Phillips IC inside that holds all the magic! It actually does quite a lot and is capable of much more then the current programming! I mean MUCH more. like RDS, SRS Surround sound, special Mono to Stereo modes for poor radio reception, Equalizer, Subwoofer outputs, Digital output, etc etc. BUT, it has to be programmed to do so and well. that aint easy.



Zc

I don't even have a 3, but it's interesting. How wouldo ne do that?

 

[Zero Cool]

I don't even have a 3, but it's interesting. How wouldo ne do that?

Well.... Conceivably, A person would have to order a development kit from Phillips and learn how the software works and how it connects to the IC. Usually a development kit will come with a Chip mounted to a test board and may or may not include a software package. That may be extra depending how much of a jerk the MFG is. But. once someone learned how the programming works. they could then conceivably dissasembly a stock radio. examin the PCB and determin if the MFG of the radio has a programming port or test pads inside the radio to connect to. Which would make sense as the factory has to program these chips somehow.

However here is where the problem lies. Some programs will not allow you to download the code from the chip. and sometimes even if you could download the program from the chip, you can't uncompile it to modify it. that means there might not be a way to modify the existing programming. you would have to understand enough about what they are doing with this chip to basically write a whole new code for it. Someone that wasnt 1000% sure of what they are doing could render a fully working stereo, a fully non working wheel chock with one button click!

If any programmers out there what to give it a hack. the clarion version of the stereo model number cc45 66 ARX Ref Number PT-2674J Uses a Phillips SAF7730HV Software controlable radio and DSP IC.

Attached is the phillips 2004/05 car stereo designers guide that has details about this IC and many others.

Oh yeah, other cool thing i found is that the clarion version uses a Phillips TDA8593 BTL I2C controllable amplifer IC which claims a max power of 46w per channel, realistically thats about 20 watts with 1-3% distortion according to the specs. But. it has a LINE DRIVER mode! In normal mode it is designed to drive 4-8 loads at 26db of gain. in line driver mode, it becomes a 600 ohm balanced line driver with 20db of gain. Meaning you can convert the speaker outputs to pro level balanced outputs but triggering a software command!

With a button click you could drive aftermarket amplifiers like the Adcoms, Hifonics, McInstosh etc that had balanced inputs(or pretty much any PRO Band type PA amp.). How you do this...again is for a hacker with more time and $$ then me...


Zero Cool

 

[tsunami]

wow kudos for all the info ZC just wish some one here had the time and money to do something with it... as i sure as hell don't.

 

[Kuro3]

Well.... Conceivably, A person would have to order a development kit from Phillips and learn how the software works and how it connects to the IC. Usually a development kit will come with a Chip mounted to a test board and may or may not include a software package. That may be extra depending how much of a jerk the MFG is. But. once someone learned how the programming works. they could then conceivably dissasembly a stock radio. examin the PCB and determin if the MFG of the radio has a programming port or test pads inside the radio to connect to. Which would make sense as the factory has to program these chips somehow.

However here is where the problem lies. Some programs will not allow you to download the code from the chip. and sometimes even if you could download the program from the chip, you can't uncompile it to modify it. that means there might not be a way to modify the existing programming. you would have to understand enough about what they are doing with this chip to basically write a whole new code for it. Someone that wasnt 1000% sure of what they are doing could render a fully working stereo, a fully non working wheel chock with one button click!

If any programmers out there what to give it a hack. the clarion version of the stereo model number cc45 66 ARX Ref Number PT-2674J Uses a Phillips SAF7730HV Software controlable radio and DSP IC.

Attached is the phillips 2004/05 car stereo designers guide that has details about this IC and many others.

Oh yeah, other cool thing i found is that the clarion version uses a Phillips TDA8593 BTL I2C controllable amplifer IC which claims a max power of 46w per channel, realistically thats about 20 watts with 1-3% distortion according to the specs. But. it has a LINE DRIVER mode! In normal mode it is designed to drive 4-8 loads at 26db of gain. in line driver mode, it becomes a 600 ohm balanced line driver with 20db of gain. Meaning you can convert the speaker outputs to pro level balanced outputs but triggering a software command!

With a button click you could drive aftermarket amplifiers like the Adcoms, Hifonics, McInstosh etc that had balanced inputs(or pretty much any PRO Band type PA amp.). How you do this...again is for a hacker with more time and $$ then me...


Zero Cool

You lost me at "conceivably" (shrug) (dunno) (uhm)

 

[Zero Cool]

Sorry dude...


The other problem with doing this is that there are many different models of HU, so you might be able to get it to work on one specific year and model of HU and then need something completly different for the next....



Zc

 

[Kuro3]

Someone need to get like a Knight Rider conversion or something, where you turn it on, and then it displays text, but also speaks it to you. Like if the voice of KITT were to say "Sit down, shutup, and hold on." I think that would be much better IMO lol