22.1 Description

The System Controller embeds 64 bits of General Purpose Backup registers organized as 2 32-bit registers.

SYS_GPBR0 to SYS_GPBR1 can be individually (each 32-bit part-select) read- and write-protected by configuring GPBR_MR. This register is write-once, which means that once it has been configured, the read or write protection is available until the loss of VBAT.

It is possible to generate an immediate full or partial clear of the content of General Purpose Backup registers by setting RSTC_MR.ENGCLR to '1' in the Reset Controller.