Can Encoder Mode Be Used on Timer Channels Other than 1 and 2

EPala.2 · ‎2023-08-10

Hi, I am working on a project with STM32H730. Due to layout limitations, we'd like to use TIM2 channels 3 and 4 rather than 1 and 2 for encoder mode if possible. Is this possible?

Peter BENSCH · ‎2023-08-10

The encoder interface is only connected to the internal signals TI1FP1 and TI2FP2, which in turn are only routed to CH1 and CH2 (see RM0468, e.g. fig. 373).

Regards
/Peter

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Peter BENSCH · ‎2023-08-10

The encoder interface is only connected to the internal signals TI1FP1 and TI2FP2, which in turn are only routed to CH1 and CH2 (see RM0468, e.g. fig. 373).

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

EPala.2 · ‎2023-08-10

So to be clear, the answer is no, channels 3 and 4 cannot be used for an encoder.

Tesla DeLorean · ‎2023-08-10

Correct, NOT SUPPORTED

You can check the AF Mux fabrics to see if anything else routes.

You'd typically want to use the 32-bit TIM (TIM2/TIM5) on most platforms for encoders.

You can also create encoder inputs via EXTI, ie interrupt on the A-Channel, check direction via B-Channel in IRQ Handler. How we did mice and track-balls in the 80's

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