Author Topic: Misterious microcontroller in mini-keyboard  (Read 964 times)

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Offline t4rmoTopic starter

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Misterious microcontroller in mini-keyboard
« on: May 27, 2024, 09:08:05 am »
I need some help identifying the chip in the picture:
The anthena bluetooth presence and the location of the oscillator can give clues, but it doesn't match with microcontrollers that I know


« Last Edit: May 27, 2024, 09:11:30 am by t4rmo »
 

Offline selcuk

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Re: Misterious microcontroller in mini-keyboard
« Reply #1 on: May 27, 2024, 09:28:42 am »
Looks like BK3432. You can check the connections with a multimeter to be sure.

https://www.semiee.com/file/BEKEN/BEKEN-BK3432.pdf
 

Offline t4rmoTopic starter

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Re: Misterious microcontroller in mini-keyboard
« Reply #2 on: May 27, 2024, 05:15:54 pm »
The pin 17 is XTAL32K in BK3432. In the chip of the picture does not seem to be XTAL32K
 

Offline amyk

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Re: Misterious microcontroller in mini-keyboard
« Reply #3 on: May 28, 2024, 02:50:46 am »
JieLi AC6321A, AC6956C, and AC7006F have the osc and RF in the right places.
 

Offline t4rmoTopic starter

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Re: Misterious microcontroller in mini-keyboard
« Reply #4 on: May 28, 2024, 09:47:42 am »
At first glance, I think the AC6321A has a pretty good chance of being: How did you find it? I tried searching in electronics stores using the filters in their search engine but couldn't find anything.
 

Offline amyk

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Re: Misterious microcontroller in mini-keyboard
« Reply #5 on: May 30, 2024, 01:19:26 am »
I knew that JieLi makes a lot of Bluetooth SoCs, and just went through their product catalog until I found a package and pinout match.
 
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