2.5 SPI Collator

The SPI Collator converts SPI wires into messages to be sent to the Distributor.

The following figure shows the SPI Collator block.

Figure 2-6 SPI Collator
To view this graphic, your browser must support the SVG format. Either install a browser with native support, or install an appropriate plugin such as Adobe SVG Viewer.


Individual SPIs can be synchronized into the SPI Collator, or the SPI Collator can be placed in the same clock domain as the interrupt sources and the messages that are synchronized into the Distributor.

Placing the SPI Collator in a clock domain that is always on and is remote from the GIC Distributor enables more aggressive power saving because the GIC Distributor can be clock gated hierarchically.

This section contains the following subsections:
Non-ConfidentialPDF file icon PDF version100336_0104_00_en
Copyright © 2016–2018 Arm Limited or its affiliates. All rights reserved.