CRC internal peripheral

Revision as of 20:23, 24 November 2021 by Registered User (Add applicable field)

Applicable for STM32MP13x lines, STM32MP15x lines

1 Article purpose[edit]

The purpose of this article is to

  • briefly introduce the CRC peripheral and its main features
  • indicate the level of security supported by this hardware block
  • explain how each instance can be allocated to the runtime contexts and linked to the corresponding software components
  • explain how to configure the CRC peripheral.

2 Peripheral overview[edit]

The CRC peripheral is used to verify data transmission or storage integrity.

2.1 Features[edit]

Refer to the STM32MP13 reference manuals or STM32MP15 reference manuals for the complete list of features, and to the software components, introduced below, to see which features are implemented.

2.2 Security support[edit]

2.2.1 On STM32MP13x lines More info.png[edit]

CRC is a non-secure peripheral.

2.2.2 On STM32MP15x lines More info.png[edit]

CRC1 and CRC2 are non-secure peripherals.

3 Peripheral usage and associated software[edit]

3.1 Boot time[edit]

CRC instances are not used at boot time.

3.2 Runtime[edit]

3.2.1 Overview[edit]

CRC instances can be allocated to:

or, on STM32MP15x lines More info.png only

Chapter Peripheral assignment describes which peripheral instance can be assigned to which context.

3.2.2 Software frameworks[edit] On STM32MP13x lines More info.png[edit]
Domain Peripheral Software components Comment
OP-TEE Linux
Security CRC Linux Crypto framework On STM32MP15x lines More info.png[edit]

Internal peripherals software table template

| Security
| Linux Crypto framework
| STM32Cube CRC driver

3.2.3 Peripheral configuration[edit]

The configuration is applied by the firmware running in the context to which the peripheral is assigned. The configuration can be done alone via the STM32CubeMX tool for all internal peripherals, and then manually completed (particularly for external peripherals), according to the information given in the corresponding software framework article.

3.2.4 Peripheral assignment[edit] On STM32MP13x lines More info.png[edit]

Click on the right to expand the legend...


Check boxes illustrate the possible peripheral allocations supported by STM32 MPU Embedded Software:

  • means that the peripheral can be assigned () to the given runtime context.
  • means that the peripheral can be assigned to the given runtime context, but this configuration is not supported in STM32 MPU Embedded Software distribution.
  • is used for system peripherals that cannot be unchecked because they are statically connected in the device.

Refer to How to assign an internal peripheral to an execution context for more information on how to assign peripherals manually or via STM32CubeMX.
The present chapter describes STMicroelectronics recommendations or choice of implementation. Additional possiblities might be described in STM32MP13 reference manuals.

Domain Peripheral Runtime allocation Comment
Instance Cortex-A7
Security CRC CRC On STM32MP15x lines More info.png[edit]

Internal peripherals assignment table template

| rowspan="2" | Security
| rowspan="2" | CRC
| CRC1
| CRC2


4 References[edit]