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Authentication requirements for APB-AP

APB-AP has one authentication signal, namely deviceen.

  • If the APB-AP is connected to a debug bus, deviceen must be tied HIGH.
  • If the APB-AP is connected to a system bus dedicated to the Secure state, this signal must be connected to spiden.
  • If the APB-AP is connected to a system bus dedicated to the Non-secure state, this signal must be connected to dbgen.

For more information, see the ARM® Architecture Specification.