ARM Technical Support Knowledge Articles

When should a master assert and deassert the HLOCK signal for a locked transfer?

Applies to: AHB

Answer

The HLOCK signal must be asserted at least one cycle before the start of the address phase of a locked transfer. This is required so that the arbiter can sample the HLOCK signal as high at the start of the address phase.

The master should deassert the HLOCK signal when the address phase of the last transfer in the locked sequence has started.

See also:

Article last edited on: 2014-02-06 13:08:39

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