SLAAEO5 September   2024 MSPM0C1103 , MSPM0C1103-Q1 , MSPM0C1104 , MSPM0C1104-Q1 , MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3105-Q1 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3505-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1 , MSPM0L1105

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction to the Debug Subsystem and MSPM0
    1. 1.1 Access Ports of MSPM0
      1. 1.1.1 Advance High-Performance Bus Access Port
      2. 1.1.2 Configuration Access Port
      3. 1.1.3 Security Access Port
      4. 1.1.4 EnergyTrace Access Port
      5. 1.1.5 Power Access Port
    2. 1.2 Behaviors With the MSPM0 in a Blank/Low-Power State
  5. 2Proper SWD Initialization Sequence
  6. 3PWR-AP
    1. 3.1 Enabling Low-Power Mode Debugging With MSPM0
    2. 3.2 Modifying the Reset Behavior of MSPM0
      1. 3.2.1 Wait for Debug
      2. 3.2.2 Halt on Reset
      3. 3.2.3 INRST Behavior
    3. 3.3 Register View
  7. 4SEC-AP
    1. 4.1 DSSM Commands
      1. 4.1.1 Factory Reset
      2. 4.1.2 Mass Erase
      3. 4.1.3 Password Authentication
      4. 4.1.4 Data Exchange
      5. 4.1.5 Wait for Debug
      6. 4.1.6 Custom DSSM Command
    2. 4.2 DSSM Flow
    3. 4.3 Register View
  8. 5Understanding Flash in MSPM0
    1. 5.1 Protection of Flash Memory Across MSPM0
    2. 5.2 Clearing the STATCMD Register
    3. 5.3 Ideal Programming Flow for MSPM0
  9. 6The Resets of MSPM0
  10. 7Summary
  11. 8References

4.1 DSSM Commands

When sending a DSSM command to the mailbox, it is serviced by the bootcode that begins executing upon performing a BOOTRST and only a BOOTRST. If a BOR or POR is executed while a DSSM command is in the mailbox it will be wiped out and not serviced as the reset levels will power cycle the power domains. It is important to note that if a password is enabled for any DSSM command, it will not fully execute the command until the password sequence has been fully executed. Once the command has been sent to the mailbox, the user then has a window of two seconds to send the password that matches the password set within nonmain. If successful only then the command will be fully processed. For all possible DSSM commands (1), see the Table 4-1. For the flow when implementing support for the DSSM commands and the register view, see Table 4-5.

Table 4-1 DSSM Command Table
DSSM Command DSSM Value
Factory Reset 0x020Ah
Mass Erase 0x020Ch
Password Authentication 0x030Eh
Data Exchange 0x00EEh
Wait For Debug 0x0206h
1. Mass erase, password authentication, and data exchange cannot be executed by the MSPM0C and MSPS device families.