2021-03-01 11:54 PM
According to AN2606 rev 14, pid 0x414 mean high-density device, pid 0x420 mean medium-density device. We just bought 500 STM32F100V8T6B. They are deployed in an existing modular product that programs the uC in-situ. The program relies on the PID to correctly work (we use several different STM32F1xx's and STM32F2xx's).
Full marking on the chip:
STM32F100
V8T6B Z
HPAXK 93
KOR HP 642
ST (c)ARM
2021-03-02 02:45 AM
Did you get the chips from a respectable source? Ask your supplier!
2021-03-02 02:50 AM
We got it from Kynix. Do they count as a respectable source?
2021-03-02 03:28 AM
I never heard of them, findchips does not list them. Does some ST website reference to Kynix?
2021-03-02 03:39 AM
Please check:
https://community.st.com/s/question/0D50X00009XkeL3SAJ/device-ids-for-stm32f100-devices
https://community.st.com/s/question/0D50X00009XkejTSAR/stm32f100rct6tr-tim12-issues
In the end, maybe you should contact your distributor to check what happened.
2021-03-02 03:49 AM
I do not believe we found Kynix from any ST website. See also my answer to Mike_ST.
2021-03-02 03:59 AM
Hello Mike,
we bought these chips privately, so what happened here was that our purchase department independently sources these chips from Kynix.
So, I do not know if these chips are counterfeit, or wrongly marked, or downmarked. To determine if I can use them after all, it would be interesting to know what parts can possibly have a PID of 0x414. Is there a "reverse list", a companion to AN2606? I assume STM32F100xC STM32F100xD and STM32F100xE will have a PID of 0x414, are there other legal possibilities? Is there any way I could find out if any of these are downmarked (except if Kynix is indeed both honest and well-structured?)
2021-03-02 04:09 AM
Anything in the F1 line beside F105/7 with >= 256 kiB Flash will have 0x414 as MCUID
2021-03-02 04:26 AM
ST had been "downscaling" partially defective parts, especially with Flash errors.
I never heard of such a case crossing family boundaries.
I would suggest to approach an official distributor, or some ST representative.
2021-03-02 04:33 AM
Really?