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CTIINTACK, CTI Output Trigger Acknowledge register

The CTIINTACK characteristics are:


Can be used to deactivate the output triggers.


CTIINTACK is in the Debug power domain.


CTIINTACK is a 32-bit register.

Field descriptions

The CTIINTACK bit assignments are:

ACK<n>, bit [n], for n = 31 to 0

Acknowledge for output trigger <n>.

Bits [31:N] are RAZ/WI. N is the number of CTI triggers implemented as defined by the CTIDEVID.NUMTRIG field.

If any of the following is true, writes to ACK<n> are ignored:

  • n >= CTIDEVID.NUMTRIG, the number of implemented triggers.
  • Output trigger n is not active.
  • The channel mapping function output, as controlled by CTIOUTEN<n>, is still active.

Otherwise, if any of the following are true, it is IMPLEMENTATION DEFINED whether writes to ACK<n> are ignored:

  • Output trigger n is not implemented.
  • Output trigger n is not connected.
  • Output trigger n is self-acknowledging and does not require software acknowledge.

Otherwise, the behavior on writes to ACK<n> is as follows:


No effect


Deactivate the trigger.

Accessing the CTIINTACK

A debugger must read CTITRIGOUTSTATUS to confirm that the output trigger has been acknowledged before generating any event that must be ordered after the write to CTIINTACK, such as a write to CTIAPPPULSE to activate another trigger.

CTIINTACK can be accessed through the external debug interface:


This interface is accessible as follows:

  • When SoftwareLockStatus() accesses to this register are WI.
  • When !SoftwareLockStatus() accesses to this register are WO.