ARM CoreLink NIC-400 Network Interconnect Technical Reference ManualRevision: r0p3
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2.3.12. Global ID and ID reduction

The CoreLink Network Interconnect uses a fixed width ID for all transactions passing through the network. This enables you to construct complex topologies.

The global ID contains the following sections:

Interconnect ID (IID)

IID is the number that identifies the interconnect connected to the ASIB.

Virtual ID (VID)

A master that is connected to an ASIB supplies the VID bits.

Slave Interface ID (SIID)

The ASIB uses the SIID to identify the slave interface in the switch that was the source of the transaction. AMBA Designer assigns the SIID.

In many cases the ID width of a master interface can be reduced to a minimum value through optimization. You can enable this by selecting ID reduction when configuring the master in AMBA Designer.

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