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A.9. ACE and CHI interface signals

Table A.9 shows the interface signals that both ACE and CHI use.

Table A.9.  ACE and CHI interface signals
SignalDirectionDescription
BROADCASTCACHEMAINT[a]Input

Enable broadcasting of cache maintenance operations to downstream caches:

0

Cache maintenance operations are not broadcast to downstream caches.

1

Cache maintenance operations are broadcast to downstream caches.

This pin is sampled only during reset of the Cortex-A53 processor.

BROADCASTINNER[a]Input

Enable broadcasting of Inner Shareable transactions:

0

Inner Shareable transactions are not broadcast externally.

1

Inner Shareable transactions are broadcast externally.

If BROADCASTINNER is tied HIGH, you must also tie BROADCASTOUTER HIGH.

This pin is sampled only during reset of the Cortex-A53 processor.

BROADCASTOUTER[a]Input

Enable broadcasting of outer shareable transactions:

0

Outer Shareable transactions are not broadcast externally.

1

Outer Shareable transactions are broadcast externally.

This pin is sampled only during reset of the Cortex-A53 processor.

[a] See Table 7.1 for more information.


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