A.8.1 Per-device interface definition

Each CHI device included in a CCN-502 system has a distinct functionality, and the requirements and configuration of its respective CHI interfaces differ.

The requirements and configuration for the CHI interfaces are as follows:

External RN-F interface

The RN-F interface consists of a request channel, snoop channel, and two response channels, one in each direction, as the following figure shows. It also has two data channels, one in each direction, for data transfers. The CCN-502 receives request messages from the RN-F and sends responses to it. In addition, the CCN-502 sends snoop messages to the RN-F and receives snoop response messages.

Figure A-1 External RN-F interface
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.


External SN-F interface

The SN-F interface consists of a request channel and a response channel as the following figure shows. It also has two data channels, one in each direction, for data transfers. The SN-F receives request messages from the CCN-502 and returns response messages.

Figure A-2 External SN-F interface
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.


Non-ConfidentialPDF file icon PDF versionARM 100052_0001_00_en
Copyright © 2014, 2015, 2017 ARM Limited or its affiliates. All rights reserved.