At this link https://infocenter.nordicsemi.com/pdf/nRF52840_Rev_2_Errata_v1.4.pdf, in 193 and 198 ID,this seems to be a mutually exclusive. In 198 workaround, .synchronize so that the CPU is not writing data to the transmit buffer while SPIM is transmitting data. If I don’t get the EVENT_END event,it cannot be judged that the data in the buffer has been sent.