A.8 CHI interface signals

This section describes the channels that form the inbound and outbound CHI interface for each device and the signals that form each channel in a specific interface.

The ARM® AMBA® 5 CHI Architecture Specification defines four channels:

  • Request (REQ).
  • Response (RSP).
  • Snoop (SNP).
  • Data (DAT).

This hierarchy enables you to understand the CHI interfaces for a specific device at a higher level than the raw signals in the respective channels.


All signal names in this section are only a root name, RootName. The CCN-502 interfaces use RootName within a more fully specified signal name as follows:

  • CCN-502 interface signal name == RootName_NID#, where # is the node ID corresponding to the specific interface.
This section contains the following subsections:
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