atmega328p-au counterfeit
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@alexsh1 Interesting, as I wasn't able to find any counterfeits reported that seem to work slightly.
Sparkfun has some counterfeits reported that appear to only have a copper plane inside, but obviously they won't work at all.
Could it be that your ATMegas are just handled badly (by the seller), or second hand, or...
Anyway, I agree with @gohan to refund.Edit: This looks scary: https://www.avrfreaks.net/sites/default/files/forum_attachments/LGT8F88A V1_1.pdf
and ftp://imall.iteadstudio.com/Microcontroller/IM131218002/Migrating_from_ATmega88_to_LGT8F88A_v1.0.pdf@yveaux I am 99% sure this is a chip problem. I have tried a few from a same batch with the same results. For example, I upload a bootloader with l:0xe2 and h:0xde fuses but the chip is running at 1Mhz. How is that possible? I had to manually write l:0x62 and than l:0xe2 in order for it to run at 8 Mhz. And I am talking about several AVRs with the same pattern.
Even the font on the AVRs is different from the ones supplied from arrow.com.
Somehow, I was convinced I could make it work.
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@yveaux I am 99% sure this is a chip problem. I have tried a few from a same batch with the same results. For example, I upload a bootloader with l:0xe2 and h:0xde fuses but the chip is running at 1Mhz. How is that possible? I had to manually write l:0x62 and than l:0xe2 in order for it to run at 8 Mhz. And I am talking about several AVRs with the same pattern.
Even the font on the AVRs is different from the ones supplied from arrow.com.
Somehow, I was convinced I could make it work.
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@gohan Its eBay. The seller is from Shenzhen, china.
Let's see if this would yield anything. I just feel frustrated as I lost so much time, which I could have spent elsewhere. -
It could be a lgt328, 328 clone by LGT (like the lgt88 quoted earlier). It's the chip used on the wemos XI. I bought one long ago and gave up as it has some differences for low power like the need to initialize all pins and even then the power consumption in sleep was in dozens of uA.
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It could be a lgt328, 328 clone by LGT (like the lgt88 quoted earlier). It's the chip used on the wemos XI. I bought one long ago and gave up as it has some differences for low power like the need to initialize all pins and even then the power consumption in sleep was in dozens of uA.
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Here I have an example of Chinese (AliExpress) sources atmega328p:
I have tried to solder a few of these, but none of them is working properly. I can upload the bootloader, but cannot upload any sketch.
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I wonder if this spells death for PCBA, since those parts gets sourced from chinese distributors.
Seems as though reliable chinese distributors must exist, or the entire system there would break down. I just have no idea who they are.
