Bootloader Not Burning/Chip not being detected/Fake chip?

Development Tools Uploading
1

Okay so we had ordered few samples of ATmega 328P-AU from Aliexpress, China but got ATmega 328PU-PH.

I tried searching for this online but didn't get any resource or mention in the datasheet.

Just for curiosity, I hooked it up in the circuit and tried boot-loading it using a Nano, it didn't work. Just a few blinks on Digital IO 13 when I power it up.

Now before I open a wrong product claim, wanted to ask :

Q) Is it an original chip or just a fake as there is no part no. available with the same name/package?

Q) Any way/method I can check this chip?

2

Hello there!

Most likely the AU and PH are the same chip, just a different packaging type maybe (bulk vs. tape and reel).

Can you post a schematic of the wiring you are using from your Nano to the 328? What program are you using on the Nano?

3

There seems to have been a recent outbreak of differently marked atmega328p's that people have been having issues with.

4

these chips are very cheap and worth buying from a reputable source.

I use www.microchip.com for mine

5

Alas, chip labeling frequently isn't an exact match for actual part numbers, so I'm not sure that non-match labels mean anything...

I hooked it up in the circuit and tried boot-loading it using a Nano, it didn't work.

Would that be a circuit and bootloading setup/process that is "known to work" with real ATmega328p chips? Or a custom-designed new board, or something you just threw together? The -AU should be an SMT chip, right? Are the chips you got SMT as well, or DIPs? There is a lot that can go wrong in the "hook it up and program it" process (especially with SMT chips.)

There are now some chips from china that are "somewhat" Atmel compatible - the LGT8F328 from Logic Green. I'm not sure if they use the same ISP programming method as Atmel chips, though.

6

Apparently the new chip markings are due to the Microchip acquisition, to bring the markings into sync with the rest of Microchip's products.

7

I have corrupted the bootloader in LGT8F328P LQFP32 miniEVB probably
I have one more functional item.
Please, let me know how to upload the bootloader again?
Mariusz