Privilege Mode of CPU in FR Family FR81S CY915XX Series MCUs – KBA217987

Version: *A

 

Question:

What is the Privilege mode of CPU in FR family of MCUs?

 

Answer:

The CPU in FR Family FR81S CY91520/ CY91550/ CY91570/ CY91580/ CY91590 Series MCUs has two operation modes: User mode and Privilege mode. User mode has a few limitations in commands or some access locations. Privilege mode does not have this limitation. See a hardware manual for detailed information.

 

Note:

This knowledge base article applies to the following series of FR81S MCUs:

  • CY91520
  • CY91550
  • CY91570
  • CY91580
  • CY91590

 

The prefix MB of the product has been changed to CY. For instance, MB915XX has been changed to CY915XX.