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# CTIINTACK, CTI Output Trigger Acknowledge register

The CTIINTACK characteristics are:

## Purpose

Can be used to deactivate the output triggers.

## Configuration

CTIINTACK is in the Debug power domain.

## Attributes

CTIINTACK is a 32-bit register.

## Field descriptions

The CTIINTACK bit assignments are:

31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
ACK<n>, bit [n]

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

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:

ACK<n> | Meaning
--- | ---
0b0 | No effect
0b1 | 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:

Component | Offset | Instance
--- | --- | ---
CTI | 0x010 | CTIINTACK

This interface is accessible as follows:

- When SoftwareLockStatus() access to this register is WI.
- When !SoftwareLockStatus() access to this register is WO.

AArch32 Registers | AArch64 Registers | AArch32 Instructions | AArch64 Instructions | Index by Encoding | External Registers | External Registers by Offset | Registers by Functional Group | Proprietary Notice

15/04/2019 16:47; 8c23526ba8a13a72aada4137daf3e3977b49036e

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