FG085 DDS EEPROM Test Failed

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peter
Posts: 1
Joined: Tue May 09, 2017 8:03 pm

FG085 DDS EEPROM Test Failed

Post by peter »

Hi,

I have a FG085 with firmwares:
Main: 08501-133
DDS: 08502-050

Diag mode always reports "DDS EEPROM Test Failed". I was also unable to upload user waveform with jyelab, however FG085 was able to connect successfully.
So i checked the board (bought from aliexpress) and noticed that u14 (24c65) was missing and so did the pull-up resistors R39 and R40. I soldered the missing parts but the error is still present.

I checked SDA and SCL with scope and there is no activity at any time. Tried to flash 053 firmware and was the same, so i reverted back to 050. Other than that the signal generator works great.
I triple checked all the connections between eeprom and MCU (u6) and everything is fine, it just won't work.

Has anybody had similar problems?

Thank you and best regards,
Peter
jye1
Posts: 1227
Joined: Wed Feb 20, 2013 4:58 pm

Re: FG085 DDS EEPROM Test Failed

Post by jye1 »

The EEPROM is and has never been used. So please ignore it. It won't affect any performance.
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