SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
Issuing a clock stop request puts the MCAN module into Power Down mode (Sleep Mode). During transition from IDLE to ACTIVE, if the MCANSS_CTRL[5] AUTOWAKEUP and MCANSS_CTRL[4] WAKEUPREQEN bits are enabled, after the MCAN Core respond to the removal of the clock stop request with removing the clock stop acknowledge, a read-modify-write will be issued to clear the MCAN_CCCR[0] INIT bit and the MCAN core will resume operation. It takes a few FCLK clock cycles for before the write to clear function effects the MCAN_CCCR[0] INIT bit. During clock stop the FCLK clock is turned off and is re-enabled when clock stop request is removed. It takes a few FCLK clock cycles for the FCLK clock to be re-enabled followed by a few more for the synchronization of the MCAN_CCCR[0] INIT bit to take effect. After completion of these steps the MCAN core resumes fully active operation.
If the MCANSS_CTRL[4] WAKEUPREQEN bit is set, the MCAN module provides a wakeup request on the following wakeup event:
The wakeup request is de-asserted when any of the following conditions occur: