About EMonj.1

EMonj.1 · 2023-08-11

Hi,depend on reference manual RM0433 Rev 8 for STM32H743 p.56.5.7 "FDCAN nominal bit timing and prescaler register" the CAN bit time can be programmed max. 81 time quanta. Is documentation correct on this place?Due to described time quantum range [1....

EMonj.1 · 2022-07-12

EMonj.1 · 2023-08-15

@Sarra.S,a similar question: NSJW description in p.56.5.7 FDCAN_NBTPNSJW "should be smaller than TNSEG2" but valid values for NSJW and NTSEG2 are both up to 127.Is hier mean should be not bigger or max. value of 127 for NSJW is wrong?

EMonj.1 · 2023-08-11

Hello @Sarra.S,what I mean here is the time quantum can't be programmed to 1024 FDCAN kernel clock periods due the size of NBRP in FDCAN_NBTP register.My actual question is about CAN nominal bit time. Is it really max. 81tq?

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STM32H743 reference manual FDCAN_NBTP description

Hello, we are using STM32H753 with USB3343 PHY. All boards are working fine but one of them need a 2.5ms. delay before enter USB_CoreReset() other case the CSRST bit in GRSTCTL register remain pending. All board power-up seems equal. Any ideas?

Re: STM32H743 reference manual FDCAN_NBTP description

Re: STM32H743 reference manual FDCAN_NBTP description