Correct, the STM32F103 was the first STM32 on the market and is therefore somewhat older. A firmware update incl. a pre-check before the run is therefore only possible with a connected host, which can reprogram if necessary.
Some newer derivatives also have Dual Bank Flash, with which such firmware updates can be carried out perfectly during operation, e.g. as FOTA.
Does it answer your question?
Regards
/Peter
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