R3910 DSP interfacing with microcontroller

rikotech8 · Joined: 10 Dec 2011 Posts: 376 Location: Sofiq,Bulgariq

Hello everyone.

I did a comprehensive google search, but I didn't succeed to find document that describes the internal registers and programming commands via which I can program the chip. I am familiar with I2C, the interface used by R3910, but I don't know the memory addresses, opcodes, SFRS of the DSP. I read the datasheet, but there is only the timing of the i2C, not commands not configuration bytes, nothing.
My hope is, someone of you might have been encountered such a file/document.
_________________
A person who never made a mistake never tried anything new.

temtronic · Posted: Mon Aug 18, 2014 2:04 pm

Well the obvious place to find it would be the manufacturer's website..though what an R3910 is I don't know..... You say it's a 'DSP' but don't say who makes it, is it a current product, etc.

jay

newguy · Joined: 24 Jun 2004 Posts: 1906

I'd be very surprised if ON Semiconductor won't give that information to you. Just ask them.

rikotech8 · Joined: 10 Dec 2011 Posts: 376 Location: Sofiq,Bulgariq

This is the email I received from the manufacturer, when I requested for it:

temtronic · Posted: Tue Aug 19, 2014 5:26 am

OK.. so no 'direct' access, it's not that big of a deal....

How much time do you have for this project?
One option is to get one of their DSP programmers and build a 'monitor' between it and the DSP device. Create one 'configuration', download it,record the 'session'.Make ONE change to the 'configuration', repeat the process. Yes, it WILL take a LOT of time and GREAT recording of data BUT you will eventually decode how the 'configuration' is arranged and sent to the DSP. You need the DSP hooked up as right now, we have no way of knowing what 'handsaking' or 'feedback' the DSP returns to the 'programmer'. Depending on how many registers are used this could take days, long days, lots of coffee too! It is a known method that I know works!

2nd option, use another device.One with 'low level' programming direct from the manufcturer.ON is not the only hearing aid DSP mfr....without knowing th efull details of your project, there are dozens of methods of doing what the ON DSP does.If you tell us WHY you want this device, someone may offer another part,heck there are DSPICs that might work for you!

The bottom line is how much time and effort you are willing to put into the project.Reverse engineering and mapping is a labour intensive effort!!

hth
jay

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

They didn't answer the question, or you didn't ask it correctly.
You want an list of the register addresses inside the chip, such as the
squelch register, volume high register, volume low register, etc.

Somehow, they got the idea that you were asking about a programmer,
such as (for PICs) ICD3, Pickit 3, etc. That's not what you want.

But anyway, I browsed the data sheet and came up with the following
comments:

Most of the parameters on the R3910 are "pre-configured". A few
parameters can be made so they are user adjustable. This makes
sense, because a hearing aid might have a remote control that lets
the user adjust volume, noise reduction, etc. They want you to
set the pre-configured parameters, by using their ARK software:
http://www.onsemi.com/pub_link/Collateral/AND9084-D.PDF
They don't want you to write your own program to set the pre-configured
parameters.

The data sheet says:

horia · Joined: 31 Oct 2016 Posts: 1

rikotech8 you have a private message!