ADAU1701 dump
Hi to all the community and support team.
First, excuse me for me for the next noob request.
i'm an electronic repair engineer and i've and issue on a PCB with an ADAU1701JSTZ embedded.
this PCB is integrated inside an active monitor. (i've another one active monitor who works well in parallel. it's can help me to take some comparatives measurements and others stuff).
My problem is the ADAU1701 is out of order (it is in complety short circuit on AGND/AVDD pins) and the supplier of the monitor don't reply to mail since 4 months ago (i suppose that the society is closed)
I don't any experience on this DSP and sigmastudio and i suppose that there is a program inside this I.C and his eeprom..? and if i change it for a new one, nothing will running well.
My question is : is there a simply and cheap method to dump the prog from the second ADAU1701 that i own (who works well and i don't want to change anything in the existing program) and reinject it into a new ADAU1701?
For information, i've the pins 20/22/23 of the ADA1701 who is connected to a separate headers on pcb.
Thanks in advance for a quick reply.
Sebastien
Audio Signal Processors
SigmaDSP Audio Processors
adau1701 dump
adau1701
The ADAU doesn't store anything, so swapping it will work if it's that chip that's the problem. Sounds like the problem is elsewhere; if there's an eeprom you can see if it's sending the I2C data or not. Obviously with the ADAU removed you should test whether there are still shorts.
Joe is exactly correct. All of the register and program settings for the ADAU1701 would have to be stored externally in an EEPROM -- the 1701 is just the processor, the memory lives elsewhere.
With the 1701 removed, make sure that the EEPROM is still in good shape. If the EEPROM is damaged, it may be impossible to salvage the program.
Regards,
Tyler
i'll swap it in a few hours, and i'm coming back to give you some news.
thanks for this quick reply and tip
I'd recommend pulling the chip, then checking again for shorts. My bet is the short is elsewhere, but who knows.
i'll do this, thanks Joe42
my interrogation is: i don't see another eeprom chip somewhere else on my board..?
Hello Sebastos08,
Then there must be a micro-controller somewhere that was loading the program into the DSP. With the DSP removed do follow the above instructions to see if there are other shorts on the PCB. But then I would power it up with no DSP on the board and check the voltages on the pins. All the pins, not just power. There is most likely a reason why the DSP shorted. This is not a failure we see often, in fact, first time I have heard of one. They are usually well isolated from external factors that damage parts. Perhaps in this design they were not careful with a GPIO or something that could see an ESD event?
Dave T
Hi All,
coming back to you to give you somes good news.
It was the DSP which was completely shorted.
i've changed it for a new one, and sound coming back again.
i' havn't take time to check which "µc" sent the prog in it.
i will continue to test it deeply in time and check if there other components which has caused the failure on the DSP.
But in the meantime I thank everyone here for guidance and advice.
Please log in to reply.