Identify the chip

[lame_turtle]

So a friends op-1 has a non working usb. The company charges a fair amount of money for replacing the whole dsp board insteda of the usb trans they claim is burnt. Ifixit has two highres photos of this board. Can anyone id the usb chip ?

https://d3nevzfk7ii3be.cloudfront.net/igi/Ao1X5QASOWNuqFV6.large

https://d3nevzfk7ii3be.cloudfront.net/igi/P2GllcMs5tD5ces6.large

Thank you very much for your time

 

[Khron]

The actual high-res photos are here:

https://d3nevzfk7ii3be.cloudfront.net/igi/Ao1X5QASOWNuqFV6.full
https://d3nevzfk7ii3be.cloudfront.net/igi/SwRqAuKHOVyrY1C5.full

That being said, the DSP chip itself contains a USB 2.0 interface.

https://www.analog.com/media/en/technical-documentation/data-sheets/ADSP-BF522_BF523_BF524_BF525_BF526_BF527.pdf

 

[lame_turtle]

I know it contains a usb interface but the usb is not working.
The 3576 seems to be Pm and Otg support, so this is the main suspect ? I still can't find any info about the chip or where to obtain it.
Also on the other side of the pcb there is a chip missing that seems it might be related to usb .

Thanks for your time anyway.

(Thanks for the high res hint. Really useful.)

5810D oled driver
345 accelerometer
s9c=ADG884
23017 I/O


3576 still seems the main suspect, any info about it ?

 

[Khron]

Which "3576" are you talking about?

There's no "chip missing" on the other side. If anything, that's a footprint for a test-connector (most likely for the development stage of the board).

 

[lame_turtle]

Which "3576" are you talking about?

There's no "chip missing" on the other side. If anything, that's a footprint for a test-connector (most likely for the development stage of the board).

Where it says financial district on top of 332.  bottom left of the front side of the pcb.

 

[Khron]

https://www.analog.com/media/en/technical-documentation/data-sheets/3576fb.pdf

I really don't see how that would be responsible for the USB (which is mainly the two data lines) not working.

The "USB OnTheGo" part only means that it's able to supply 5v TO a connected USB device, like a pendrive or a mouse or keyboard. It has diddly-squat to do with the actual USB comms.

So unless you can source and replace the BGA DSP chip yourself (or have a tech successfully do it cheaper than the full board swap), i don't see many options...

 

[lame_turtle]

https://www.analog.com/media/en/technical-documentation/data-sheets/3576fb.pdf

I really don't see how that would be responsible for the USB (which is mainly the two data lines) not working.

The "USB OnTheGo" part only means that it's able to supply 5v TO a connected USB device, like a pendrive or a mouse or keyboard. It has diddly-squat to do with the actual USB comms.

So unless you can source and replace the BGA DSP chip yourself (or have a tech successfully do it cheaper than the full board swap), i don't see many options...

I still cannot understand how the usb interface on the blackfin could be burned, this really I cannot comprehend in my mind but well  turtles are turtles after all. We've done several ps3 bga's after all  we might try this haha . Thanks again.

(Btw, if memory serves correctly otg means data lines too, thumb drive support on it's most basic edition. If only I could find and source this chip I would give it a swap anyway just for the sake of it)

 

[Khron]

Yes, "OTG" does indeed include the data lines as well, but noone says the comms/interface chip needs to be the one providing the power as well, or vice-versa.

By "the USB OTG part" i meant strictly in regards to the LT3576 power management chip.

You mean this one?

https://www.mouser.fi/Semiconductors/Embedded-Processors-Controllers/Digital-Signal-Processors-Controllers-DSP-DSC/_/N-86p5d?Keyword=adsp+bf524&FS=True&Ns=Pricing|0

 

[lame_turtle]

Haha no ment 3576

 

[Khron]

What you could do first, is check that all the voltages on the surrounding inductors are largely what they're supposed to be. The DSP's datasheet should contain at least some of the values to look for.

https://www.mouser.fi/Semiconductors/Power-Management-ICs/Battery-Management/_/N-wnwk?Keyword=ltc3576&FS=True&Ns=Pricing|0


PS: The first feature on the first page of the datasheet says "Bidirectional Switching Regulator with Bat-Track™ Adaptive Output Control Provides Efficient Charging and a 5V Output for USB On-The-Go".

I'm preeeeeeeeetty sure that's the entire extent of the LTC3576's involvement with the OTG side of things.

 

[lame_turtle]

You're totally right I guess

 

[rlaury]

https://www.analog.com/media/en/technical-documentation/data-sheets/3576fb.pdf

I really don't see how that would be responsible for the USB (which is mainly the two data lines) not working.

The "USB OnTheGo" part only means that it's able to supply 5v TO a connected USB device, like a pendrive or a mouse or keyboard. It has diddly-squat to do with the actual USB comms.

So unless you can source and replace the BGA DSP chip yourself (or have a tech successfully do it cheaper than the full board swap), i don't see many options...

Raspberry Pi  4 Ports USB Hub & I2C 23017-2