9.1.1 Registers Properties

PAC Write-Protection Register Property:

Some registers are optionally write-protected by the Peripheral Access Controller (PAC). The PAC write protection is denoted by the "PAC Write-Protection" property in each individual register description. For more details, refer to the PAC - Peripheral Access Controller.

Read-Synchronized, Write-Synchronized Register Property:

Some registers (or bit fields within a register) require synchronization when read and/or written. Synchronization is denoted by the "Read-Synchronized” (bits) and "Write-Synchronized” (bits) property in each individual register description. For more details, refer to Register Synchronization.

Enable-Protected Register Property:

Some registers (or bit fields within a register) can only be written when the peripheral is disabled. Such protection is denoted by the "Enable-Protected” (bits) property in each individual register description.

Mix-Secure Peripherals Register Property:

A Mix-Secure Peripheral has different types of registers (Non-Secure, Secure, Write-Secure, Mix-Secure, and Write-Mix-Secure) with different access permissions for each bit field.

In the following register descriptions, the access permissions are specified.

For more details, refer to Peripherals Security Attribution.

Bitfield Access Properties:

The access properties of bit fields within a register are defined as follows: