Usage of ULPI & CANFD interfaces

[Meghna]

I want to use the ULPI interface & both the CAN interface for my project

But I see 

For USB:

Pin No: 194     pin name: PB5     Module function :  USB_OTG_HS_ULPI_D7,   ONLY ONE PIN no other pins are there

For CAN

Pin No: 194,195    pin name: PB5,PB6     Module function :  CAN2_RX,CAN2_TX  

Pin No: 104,105    pin name: PB12,PB13     Module function :  CAN2_RX,CAN2_TX   

How to proceed with it, since we have clash with Pin No 194?

[FBL]

Hi @Meghna 

Which product are you using? You can refer to reference board nucleo, disco or eval board's schematics and check whether UPLI pins are correctly set.

[mƎALLEm]

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@FBL wrote:

Hi @Meghna 

Which product are you using? 

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To be exact which part number? (STM32H743BIT6 ? as per your previous thread). That indicates also the package.

[Meghna]

As suggested in the datasheet STM32H743BIT6 we are interfacing it with USB3320 using ULPI interface, apart from this we have using CANFD 2 interfaces , there we are seeing that pins are overlapping, where in we cannot support these 3 (CANFD1, CANFD2, ULPI), Am I wrong somewhere?

[mƎALLEm · Accepted solution]

Doing the exercise on STM32CubeMX, it seems you cannot use FDCAN2 with USB_HS with external PHY as they share some IOs:

So you can't use both USB_HS and FDCAN2 at the same time. Unfortunately, no alternative for FDCAN2

[Meghna]

yes this was the confirmation required, No alternatives ?

[mƎALLEm]

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@Meghna wrote:

yes this was the confirmation required, No alternatives ?

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Already answered that question in my previous comment: "Unfortunately, no alternative for FDCAN2"

[Meghna]

ok, Thanks, 

Source impedance of the pins of STM32H743BIT6 pins is mentioned in which section of the datasheet?

[mƎALLEm]

Hello,

This is another question that you need to open a separated thread for it.

Thank you for your understanding.