Help Recognising Zigbee IC or Module - 3A Nue Zigbee RGBW Downlights

Hardware
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1

Hi :slight_smile:
Does anybody recognize this Zigbee chip or module? I’ve tried searching the text written on the IC, but I haven’t had much luck.
For various reasons, I’d like to try my hand at writing my own firmware.

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2

I found it! But now I’m stuck because I haven’t found any documentation other than the raw text on the manufacturer’s website which I’ve run through Google/Chrome Translate.

The IC:
FZX6180N Series
Note that the website photo shows FZX6180NEB but my photo doesn’t have the B, and the code at the bottom of the IC is different. Without a datasheet, I can’t check what the differences mean.
http://www.fbee.com.cn/xinpian/6-32.html

The Module:
FZD5613
http://www.fbee.com.cn/mozu/7-26.html

3

How do I reflash this IC? I haven’t found any documentation. I also haven’t found any electrical documentation for the module.