Thank you for responding.
> As forEDMA transfer does not start,does it never start again or just need to wait LCD drawing done to start eDMA?
Yes, I think so. sorry, Since I have not examined it in detail, I do not understand details.
However, the following phenomenon occurred (Reproducibility is low in either case.).
As a result of various experiments, exclusive control to NOCAHCHE memory was done using semaphore etc., it seems that phenomenon does not occur. (But I do not know the real cause).
> BTW. The master priority of read/write is determined by NIC module.
> Customer can configure the masters' priorities with NIC.
Thank you for yout adivse! I'll confirm RM.