Change STM32F103 to STM32F303

STLearner · ‎2023-05-04

Hi ST experts,

According to AN4228, we can migrate the MCU from F103 to F303 with minor changes development needed. Just wanted to understand more on the pin assignment between the parts, I take an example of STM32F103ZET6 vs STM32F303ZET6 with same package, the pin configuration in P10, P11 and P106 are different.

What exactly is the function of the pin for PF0 & PF1 in F103 and PH0 & PH1 & PH2 in F303?

Appreciate your reply. Thanks.

Peter BENSCH · ‎2023-05-04

Correct, these and two other pins are also mentioned as a difference in AN4228, Table 3. On the STM32F303ZET6, ports PF0 and PF1 have been moved to pin 23/24 (OSC_IN/OSC_OUT) as an alternative function.

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STLearner · ‎2023-05-21

Hi Peter,

The ADC function of pin PF6-PF10 were missing in STM32F303. Is there any alternative ADC function can be found in STM32F303? Thanks.

Peter BENSCH · ‎2023-05-22

Since you have not sufficiently described the requirements, no recommendation can be made so far.

PF6...PF10 do not have an ADC function. A STM32F103ZET6 cannot simply be replaced by a STM32F303ZET6 if you have used these pins as ADC inputs.

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