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Author Topic: Identify MCU  (Read 2739 times)

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Offline juffeTopic starter

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Identify MCU
« on: May 06, 2024, 10:40:29 am »
How I can identify this mcu? I think so that it is cortex m0? But what version? And what is pinout?
Text top of mcu is NM002 2246. There was also sticker top of mcu 4C56WT 12842K.
PCB is from laser distance meter. Chinese one.
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Offline abraxalito

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Re: Identify MCU
« Reply #1 on: May 07, 2024, 02:44:43 am »
The rather unusual 10pin package makes me think its a Puya PY32F002 in MSOP10. Which is indeed a Cortex M0+. Oh but did you mean the square package in the 2nd pic?
« Last Edit: May 07, 2024, 02:47:17 am by abraxalito »
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Offline mon2

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Re: Identify MCU
« Reply #2 on: May 07, 2024, 03:20:26 am »
The msop10 packaged device is a PLL with m5351A (clone of the si5351a). Datasheet of the clone is on lcsc.com.
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Offline juffeTopic starter

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Re: Identify MCU
« Reply #3 on: May 08, 2024, 10:32:07 am »
I mean mcu on second picture square 32pin, first picture is before I remove sticker from top of the mcu
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Offline gamalot

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Re: Identify MCU
« Reply #4 on: May 08, 2024, 10:39:57 am »
I saw an article by a Chinese engineer about the reverse engineering of this distance meter, and he couldn't guess what model the MCU was.
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Offline pcprogrammer

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Re: Identify MCU
« Reply #5 on: May 08, 2024, 10:43:21 am »
Try to draw up a schematic and identify the power pins on the 32 pin QFN package. That might help in figuring it out, but it could be a custom part.
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Offline IOsetting

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Re: Identify MCU
« Reply #6 on: May 08, 2024, 11:34:39 am »
Someone already disassembled this laser meter but neither he can identify this nm002 chip

https://mbb.eet-china.com/tech/t5/160767.html

In case you can not login to view the content,  I attached the screencap of the translated page
« Last Edit: May 08, 2024, 11:37:42 am by IOsetting »
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Offline m k

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Re: Identify MCU
« Reply #7 on: May 08, 2024, 12:54:47 pm »
GND at pin 14 is not usual, maybe ColdFire V1.
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