FG-100 DDS generator, need help identifying the IC

[keenox]

Hi!

Just bought 3 pcs FG-100 from Aliexpress and saw that they should come with Atmega328P and thought I could reprogram them, but mine came with some unmarked IC. Thought it is an Atmega chinese clone, but the pinout doesn't quite match. It only has one pin for GND and one for VCC. I marked what I managed to trace from the buttons and the programming header.
Any idea what the IC could be and how I could program it?

LE: Did a bit of searching and looks like it might be LGT8F328P, but not 100% sure yet

[coromonadalix]

yeah  normally atmega family or some stm32 ic's   in most of their gimmick

could be atmega family  but not the 328 ??     you have to search all the datasheets pinouts ??

some where atmega 48 ??

as you may know  mostly dip ic's  pinouts

you had one project on the web to improve it / add more functionality


maybe with avrdudess / avr dude and an isp programmer   you try to read the mcu id  while going into all the mcu library

[keenox]

@coromonadalix: I am 100% sure it is not an Atmega chip as those have multiple GND and VCC pins and this chip only hase one of each. I did some searching and it might be a Chinese 328P clone, LGT8F328P, but I have yet to confirm it.

[coromonadalix]

you have  the 328b  who's not perfectly an 328p 

yours is a new variant,  never saw theses with this mcu type

i have one with an dip 328 ...

[keenox]

It's not an atmega328pb.
If anyone else is interested, I have fully confirmed it is an LGT8F328P. It even has a 32Mhz oscillator on the PCB. I managed to read the flash using LGTISP (https://github.com/brother-yan/LGTISP) flashed to an Arduino Nano. Next, I will try the custom firmware by @tim.savage