NRF52840 SPIM3 SCK not Pluse

[wsl]

SCK:P014

MOSI:P016

MISO:P015

CS:P017(SOFT)

nrf_gpio_cfg(SCK, NRF_GPIO_PIN_DIR_OUTPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE);
nrf_gpio_cfg(MOSI, NRF_GPIO_PIN_DIR_OUTPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE);
nrf_gpio_cfg(CS, NRF_GPIO_PIN_DIR_OUTPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE);

The SCK pin cannot generate the correct pulse, and it is necessary to use JLINK for soft reset。

Power on reset and software reset are invalid。

The MCU must be connected with JLINK (it will send a reset automatically) to output pulse normally, no matter whether the frequency of SCK is 125k or 32m。

May I ask why there is such a problem? Is there a bug in spim3 itself?

[haakonsh]

The SCK pin cannot generate the correct pulse

Can you share a logic scope of the SPI transfer?

Are you using a DK or a custom board?

If a DK, what version do you have?

[wsl]

Is custom,and There is no clock generation on SCK。