STM32H743VIT6 ADC different channel sampling rates

hanqingze · ‎2024-09-18

I have two questions. One is how are Y and V distinguished? The other is where can I know what channels these Direct channels and FAST channels include?

STTwo-32 · ‎2024-09-18

On your MCU STM32H743VIT6, you have only 3 ADC Fast channels (as indicated on the last page of table 2 of the DS12110)

Those channels are ADC12_INP3 (mapped to the PA6), ADC12_INP4 (mapped to the PC4) and ADC12_INP5 (mapped to the PB1).

PS: ADC1 and ADC2 are tightly coupled and share some external channels (such as those that we have mentioned before). For the PF3, PF5, PF7, PF9, PF11 and PF13, they are also fast channels, but they don't exist on your MCU (as you can see on the Table9 of the DS12110) Your MCU Pin/ball name is LQFP100 or TFBGA100 (you can find the Pin/ball of your MCU on the Bottom of the Table 2 of the DS12110:(

Here is an example of the PF5 that output the fast channel ADC3_INP4, but it is not available on the LQFP100 or TFBGA100:

Best Regards.

STTwo-32

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STTwo-32 · ‎2024-09-18

Hello @hanqingze

For the Revision of the MCU, you can find it on the external cover of the MCU for example for the STM32H743ZIT6U, it is near ST Logo. It is a big letter (V or Y).

For the Fast Channels they are available on the RM0433 Rev8 on the Figure 138 ,139 and 140:

Next Time, please use the official forum language (English). Here is what our customer said:

I have two questions. One is how to distinguish Y and V? Another question is, where can I know these Direct channels, which channels include FAST channels?

Best Regards.

STTwo-32

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hanqingze · ‎2024-09-18

Thanks, but I realized I didn't find Figure 138 ,139 and 140, can you take a screenshot or post a link?

STTwo-32 · ‎2024-09-18

They are available on the Post as screenshots and on the pages 920, 921 and 922 of the RM0433.

Best Regards.

STTwo-32

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hanqingze · ‎2024-09-18

Is this file for the Y version, the manual's description of the V version, including the direct channels。

On datasheet pages 276-281。

Are the differential inputs from VINP0-VINN0 to VINP5-VINN5 all fast channels?This differs from the screenshot above where Fast channels correspond to PF3, PF5, PF7, PF9, PA6, PC4, PB1, PF11 and PF13.

STTwo-32 · ‎2024-09-18

On your MCU STM32H743VIT6, you have only 3 ADC Fast channels (as indicated on the last page of table 2 of the DS12110)

Those channels are ADC12_INP3 (mapped to the PA6), ADC12_INP4 (mapped to the PC4) and ADC12_INP5 (mapped to the PB1).

PS: ADC1 and ADC2 are tightly coupled and share some external channels (such as those that we have mentioned before). For the PF3, PF5, PF7, PF9, PF11 and PF13, they are also fast channels, but they don't exist on your MCU (as you can see on the Table9 of the DS12110) Your MCU Pin/ball name is LQFP100 or TFBGA100 (you can find the Pin/ball of your MCU on the Bottom of the Table 2 of the DS12110:(

Here is an example of the PF5 that output the fast channel ADC3_INP4, but it is not available on the LQFP100 or TFBGA100:

Best Regards.

STTwo-32

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.