Hello NXP users, I am a novice designer who recently started designing circuits.
I have a question for you, NXP experts.
Using the STM32f407VGT MCU operating at 3.3V, using the CAN1TX(PB9) CAN1RX(PB8) pins, the circuit was configured by referring to NXP's TJA1042T/3 High Speed Can Transceiver datasheet, which can also operate at 3.3V logic.
Based on the configured circuit, I recognized the problem that CAN data was not output while debugging using the CAN communication equipment of Peak System.
As a result of hardware debugging, I know that the existing High Speed CAN communication method operates at 3.5V and 1.5V for CAN H based on 2.5V.
In my circuit, the standard for 2.5V is the same, but CAN H is about We have identified a problem that operates at 3.9V, CAN L about 1.1V.
Maybe there is something wrong with my circuit? I need your help.
To add one thing, the differential voltage of CAN communication should come out to be 2V, but my board has a problem that it comes out close to 3V.
