Beken BK3231

[brainstorm]

Sorry for the cross posting, but I wonder if somebody over the EEVBlog community has ever poked this ~$2 Bluetooth HID IC a bit further than just the UART:

https://mitxela.com/forum/topic/beken-bk3231

It's relatively old (ca 2014?) but it's inside a bunch of cheap HID gadgets, ARM968 core... if anybody has good pointers about poking it via SPI (to dump its flash section), I'm all ears