STM32F103C8T6 Blue Pill + clone stlink found chip id is 0x414 and flash memory is 256Kb!

BAS-BLEU · ‎2025-12-14

i am using bluepill board. which PA9,PA10 is connected to header. when i connect FTDI as RX Tx mode and also i cheked REST status(reset is high if switch not pressed) but cube programmer say exact like you. my target chip is STM32F103C8T6. using clone stlink i found chip id is 0x414 and flash memory is 256Kb which is not according to datasheet of that MCU.

mƎALLEm · ‎2025-12-14

Hello,

Clone STLINKs and Blue Pills boards are not ST products. Blue Pill boards contain conterfeit chips.

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AScha.3 · ‎2025-12-14

Your chip might be genuine STM , just a bigger one:

Product ID (PID): 0x414 identifies it as a High-density F1 device (like F101/F103) by the bootloader, though different F1 series (Low, Medium, High) have different PIDs (e.g., 0x410, 0412, 0420).

Try using it as F103C8 , or try start a project for F103CC and generate code and try debug with a simple test program.

Then you know: chip working fine - or not.

Probably its just this way: today its more expensive to produce six different dies/chips , just because of different flash/ram size, than just one "big" and still can sell it at all sizes , or even better: the "bad" chips, memory not working at full size, still no waste, can sell it at the smaller size type and save money.

And you could be lucky: got a F103 with 256K flash at the price of 64K chip. :)

(or its a fake - just test it.)

die 414 could be:

die 410:

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