Welcome, @Vivian Wang, to the community!
these particular microcontrollers were discontinued a long time ago, but were also not generally available, as they were custom devices that only the specific customer had documentation on.
There are also no substitutes for these devices.
If the problem is solved, please mark this thread as answered by selecting Select as best, as also explained here. This will help other users find that answer faster.
Regards
/Peter
In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
