Do you identify this MCU? [Solved]

[Sacodepatatas]

It comes from a very cheap 32 LED bar (WS2812 style). The user manual states that the core processor is a 32bit ARM, but All i can read with a magnifier lens is "BP0L154-63A2" or maybe "BP0L164-63A2". The logo is also strange to me. It seems JL but the JL manufacturer has another nomenclature for their MCUs. It could also be JC or JE.

Any clues? Thanks.

ONE YEAR ANNIVERSARY EDIT: Mistery solved. It's an AC6963A (the 63A2 gives the right clue)

[pcprogrammer]

You can try if the USB port gives a clue. The 5 pads on the PCB might include a USB port. DP and DM are often used to name the USB (1.1, 2.0) signals.

[amyk]

Definitely JieLi, and I wouldn't be surprised if they label their ICs with all sorts of different markings. They do have QFN20 MCUs with USB, I wonder if this is one that failed the BT part but was otherwise usable.

[bidrohini]

Definitely JieLi, and I wouldn't be surprised if they label their ICs with all sorts of different markings. They do have QFN20 MCUs with USB, I wonder if this is one that failed the BT part but was otherwise usable.

Where can we find the datasheets of JeiLi MCUs? Searched on google. Couldn't find any.

[Sacodepatatas]

Interesting... It makes sense to me. I thought that JieLi was using the AD prefix for all their mcu series. Maybe this is an AD6983D in disguise. Notice that there is an unpopulated xtal pad where a Bluetooth oscillator would be located at otherwise.

I've watched a YouTube video tearing down a previous version of this bar (16 LED instead of 32), and it has a SOP8 microcontroller that has been sanded, but looking at the power pins, this could be a Fremont OTP Pic clone (maybe FT60E21X).

https://youtu.be/i-erVhVnKjk

[DavidAlfa]

Why bother?
99% of the time they're basic MCUs with OTP ROM, no SDK/compiler, unknown programming protocol, unobtanium programmers...

[Sacodepatatas]

Mistery solved casually. I was looking for another JL chip coming from a cheap Bluetooth speaker, and ended up inside a russian forum where people are kinda working (hacking) with this brand of ICs. One of the commenters stated that Jie Li has a curious marking on its chips. The string that appears after the hyphen is the last part of the reference, excepting that the last digit represents the flash memory amount in megabits. It turns out that the QFN20 packed part AC6963A matches exactly its pinout even for the mic preamp input and biases. Notice that the PCB has no pads for the DACR/L outputs and the BT ant pin, because of that those pins are not soldered. The MCU core is of the AC69 family of the JL processors, the same as the ubicuous AC6905A qsop24 IC.

More info regarding this family of MCUs...

https://github.com/christian-kramer/JieLi-AC690X-Familiarization
https://github.com/buzzcola3/JieLi-AC690X-Programming
https://www.eevblog.com/forum/projects/jl-bluetooth-ic-id/
https://esp8266.ru/forum/threads/jl-soc.5500/