SLAAEQ5 March   2025 MSPM0C1103 , MSPM0C1104 , MSPM0C1104-Q1 , MSPM0C1105 , MSPM0C1106 , MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G1518 , MSPM0G1519 , MSPM0G3105 , MSPM0G3105-Q1 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3505-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1 , MSPM0G3518 , MSPM0G3518-Q1 , MSPM0G3519 , MSPM0G3519-Q1 , MSPM0H3216 , MSPM0L1105 , MSPM0L1106 , MSPM0L1228 , MSPM0L1228-Q1 , MSPM0L1303 , MSPM0L1304 , MSPM0L1304-Q1 , MSPM0L1305 , MSPM0L1305-Q1 , MSPM0L1306 , MSPM0L1306-Q1 , MSPM0L1343 , MSPM0L1344 , MSPM0L1345 , MSPM0L1346 , MSPM0L2228 , MSPM0L2228-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Cyber Security Requirement Introduction
    1. 1.1 Cyber Security Requirement for MSPM0
  5. 2MSPM0 Debug Register Introduction
  6. 3Implementation
    1. 3.1 Debugger with Mailbox
    2. 3.2 MCU
      1. 3.2.1 Usage and Configuration of Nonmain
      2. 3.2.2 MSPM0 Software Implementation
  7. 4Execution
    1. 4.1 First Time Flashing
    2. 4.2 Access to Locked MCU
  8. 5How to Customize Passwords
    1. 5.1 Password
    2. 5.2 Password Length
  9. 6Summary
  10. 7References

3.2.1 Usage and Configuration of Nonmain

MSPM0 utilizes the SEC-AP to communicating with application software by DSSM. The prerequisite for this to work is that the Arm serial wire debug port needs to be retained to make sure that data can be received. Then, the data can be dealt in DSSM. At the same time, to prevent hackers from accessing the MCU app code, the AHB-AP port is disabled in Nonmain.

For factory reset, to prevent the MCU code from being easily cleared, choose to disable in Nonmain.

The most important part of the configuration process is the password setting. Since there is extra space in the Nonmain area of ​​the MSPM0C that is not allocated to the corresponding register, the software password can be stored here. Doing so also allows customers to avoid having to repeatedly burn the password into the MCU when updating the code later.

According to the above, MSPM0C series Nonmain configuration is as shown in Table 3-2.

Table 3-1 Nonmain Register Configuration (MSPM0C Series)
Offset Acronym Setting Value Purpose
41C00000h BCRCONFIGID 0x00000003

Configuration ID of the BOOTCFG
41C00004h BOOTCFG0 0xAABBFFFF The SW-DP is enabled but AHB-AP, ET-AP, PWR-AP are disabled
41C00008h BOOTCFG3 0xFFFFFFFF Disable factory reset command;Disable static write protection configuration for Non-Main
41C0000Ch SWPMAINLOW 0xFFFFFFFF Disable lower part Flash protection
41C00010h SWPMAINHIGH 0xFFFFFFFF Disable higher part Flash protection
41C00014h Password0 Customization No hardware register. Use Nonmain remain free area to store the password
41C00018h Password1
41C0001Ch Password2
41C00020h Password3