Arm
®
CoreLink™ GIC-600AE Generic Interrupt Controller
Technical Reference Manual
Document ID: 101206_0003_04_en
Issue: 04
Components and configuration
The interface is fully credited so all messages can be accepted without dependency on any other
ports.
3.3.4 ITS Q-Channel
The ITS has a Q-Channel interface which controls requests from an external clock gating source.
If the ITS is busy, the Q-Channel interface asserts the qdeny signal to deny an external request to
gate its clock. When an external request occurs, the interface requests a wakeup by asserting the
qactive signal.
The qreqn input signal is synchronized to the ITS.
Related information
Power control signals on page 251
3.3.5 ITS configuration
You can configure several options that relate to the operation of the ITS block.
Table 3-9: Configurable options for the ITS
Feature Range of options
DeviceID width 3-20
EventID width 1-16
CollectionID width 2-14
Inclusion of a bypass port True or False
MSI-64 support, which controls whether the DeviceID is sent using the awuser signals or on bits[63:32] that
are written to GITS_TRANSLATER. See 4.12 MSI-64 on page 65.
True or False
The number of credits for supporting transfer of LPIs using non-locked translations to the Distributor. 1-16
ACE-Lite subordinate interface address width 20-48
ACE-Lite subordinate interface data width 64, 128, 256
ACE-Lite subordinate interface read ID width 1-32
ACE-Lite subordinate interface write ID width 1-32
AXI4-Stream data width 16, 64
ECC support for the caches.
For more information, see 4.15 Reliability, Accessibility, and Serviceability on page 68.
True or False
Collection cache depth, or cache entries ÷ 2 2, 4, 8, 16, 32, 64, 128,
256, 512
Device cache depth, or cache entries ÷ 2 2, 4, 8, 16, 32, 64, 128
Event cache depth, or cache entries ÷ 2. The number of Device and EventID pairs that are cached in the ITS. 2, 4, 8, 16, 32, 64, 128,
256, 512, 1024, 2048
Domain name.
For more information, see Figure 3-8: GIC-600AE top-level structure options on page 47.
Any legal domain identifier
For more information, see the Arm
®
CoreLink
™
GIC-600AE Generic Interrupt Controller Configuration
and Integration Manual.
Copyright © 2018–2020, 2022 Arm Limited (or its affiliates). All rights reserved.
Non-Confidential
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