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[FAQ] TDA4VM: How to check if R5F is in lock-step or split mode

Genius 12610 points

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Part Number: TDA4VM

How can I check if R5F is running in lock-step or split mode? Is there some register I can look at?

  • The c15, Build Options 2 register can be used to check this.

    To view this register we can use CP15 registers from System Registers.

    Registers -> System_Registers -> CP15_BUILD_OPTIONS_2 register. The bit 30 (LOCK_STEP) here denotes if the R5F is in Lock-step or split mode. 

    30th Bit:

    0 :: Split mode

    1 :: Lock step mode