Renesas RA Series Quick Design Guide

Renesas RA Family RA4 Quick Design Guide
R01AN5988EU0100 Rev.1.00 Page 33 of 51
Jul.21.21
Figure 25. ID Code Setup for RA4M1 (Arm Cortex-M4 Core) Using Renesas FSP Configurator
Note: ID code protection settings must be handled carefully to prevent mistakes that may result in blocking
accesses to the MCU.
8.4.3 Flash Block Protection
RA4 MCUs with Arm Cortex-M33 core have a Flash Block Protection feature that protects secure or non-
secure flash region from being erased or reprogrammed by secure or non-secure software. It is worth noting
that the protection is for both Secure and Non-secure software accesses.
Refer to section “Configuring the Flash Block Protection” in Securing Data at Rest Using the Arm
®
TrustZone
®
application note for more details.
8.4.4 Memory Protection Unit
RA4 MCUs have a Memory Protection Unit (MPU). They have the ability to protect various MCU memory
regions from illegal access. The choices include allowing both reading and writing, prohibiting writing, and
prohibiting writing and reading. Select one of these options by setting the corresponding constant value at
the specific memory address. See ‘Memory Protection Unit’ in the MCU Hardware User’s Manual for more
details.

Renesas RA Series Specifications

General

Brand	Renesas
Model	RA Series
Category	Microcontrollers
Language	English