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I'm decently skilled with basic ic identification methods and lot number cross reference identification for the rebadged chips, but I've ran into a chip I just cannot identify. On the same board there are some chips I could only track down via lot number, so I'm sure this one won't be super simple. This product was made in China, possibly with anti-cloning in mind.

My leads so far: It appears to be the only micro controller on the device. It's driving a small oled display, a few gpio for interfacing, either has a few analog pins for current/voltage reading or it has an offboard chip I don't know about. The Logo looks like Gigadevice, but they don't even make a chip in the same package from what I could tell...

enter image description here

enter image description here

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That logo definitely is the GigaDevice logo.

The 28-pin package and the label "F130G6" point to the GD32F130G6U6.

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    \$\begingroup\$ +1. A good referens here elnec.com/support/ic-logos/?method=logo \$\endgroup\$ – GR Tech Mar 4 '15 at 18:30
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    \$\begingroup\$ Ah! I didn't see that package on their site. Also, I was misinterpret ing the G as a 6 and the 6 as a 5... Whoops. Thanks! \$\endgroup\$ – Sam Bretz Mar 4 '15 at 19:59
  • \$\begingroup\$ FWIW: The GD32 line is more or less a clone of the STM32, and a lot of the same tools can be used to debug them. \$\endgroup\$ – duskwuff Aug 8 '17 at 20:07

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