ARM AMBA NIC-301 ユーザーズマニュアル

ARM DDI 0397G

2-4

ID031010

All transactions originating from this slave interface are flagged as non-secure 
transactions and cannot access secure components.

The AxPROTx signal determines the security setting of each transaction, and 
the slaves that it can access.

•

Support for the full AXI protocol.

 

You can achieve a gate count reduction and a performance increase if the attached master 
does not create any AXI lock transactions.

•

Write acceptance capability of 1-32 transactions.

•

Read acceptance capability of 1-32 transactions.

•

Buffering, see FIFO and clocking function on page 2-15.

•

Timing isolation:
—

from the external master

—

from the infrastructure.

The AMBA Network Interconnect can support the full AHB-Lite protocol using either:
•

an AHB-Lite slave interface

•

an AHB-Lite mirror master interface.

The following configuration options can improve AHB-Lite to AXI performance, but cannot 
always be used robustly:
•

INCR promotion and Early Write Response

•

allow broken bursts

.

If you configure the interface as an AHB mirror master interface, you cannot configure 

allow 

broken bursts

 because the AHB-Lite protocol does not permit AHB-Lite masters to break 

bursts.

Table 2-1 shows the four combinations for the configuration of 

INCR promotion and Early Write 

Response

 and 

allow broken bursts

 and contains links to detailed descriptions for each option.

INCR promotion and Early Write Response

allow broken bursts

Configured

Not configured

Not configured

Configured

Configured

Configured

Not configured

Not configured