What is the 0R in front of the resistors

Nimai_Singhal · ‎2025-10-14

Can someone please help me find the value of 0R, as I am trying to use the CAN FD, but I am not able to figure out the values of the resistor.

mƎALLEm · ‎2025-10-15

Hello @Nimai_Singhal and welcome to the community,

1- This is not a ST product. You need to ask NXP for that. 0R = 0ohm. It's just a solder bridge.

2- TJA1050 is not intended to be used in CAN-FD mode i.e. > 1Mb/s. From the datasheet:

If you are using STM32 having FDCAN interface, you can use it only in Classic mode.

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TDK · ‎2025-10-14

0R means 0 Ohms. It's just a jumper--no resistance.

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FGUIT · ‎2025-10-15

Hello,

To protect this CAN transceiver against ESD and EOS, you can add ESDCAN04-2BLY or ESDCAN04-2BWY on CANH and CANL, as close as possible to P2 connector. Layout is important for ESD protection devices, you can find layout tips on AN5686.

Best regards.

Fabrice.

mƎALLEm · ‎2025-10-15

Hello @Nimai_Singhal and welcome to the community,

1- This is not a ST product. You need to ask NXP for that. 0R = 0ohm. It's just a solder bridge.

2- TJA1050 is not intended to be used in CAN-FD mode i.e. > 1Mb/s. From the datasheet:

If you are using STM32 having FDCAN interface, you can use it only in Classic mode.

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.

Nimai_Singhal · ‎2025-10-15

Thank you so much.

Can you recommend some chips that may be good for CAN-FD purposes?

Nimai_Singhal · ‎2025-10-15

Thank you so much.

Nimai_Singhal · ‎2025-10-15

Thank you so much,
I will definitely keep this in mind while creating my CAN-FD.

mƎALLEm · ‎2025-10-15

@Nimai_Singhal

No need to post several posts. You can Tag everyone here using @ and say what you want in the same post.

@Nimai_Singhal wrote:

Thank you so much.

Can you recommend some chips that may be good for CAN-FD purposes?

That depends on the bitrate you will be using in the data phase.

MCP2562FD could reach 8Mb/s. It's already used on STM32H743I-EVAL board:

You can refer to this article: STM32 FDCAN running at 8 Mb/s on NUCLEO boards

Hope that helps.

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