ARM Technical Support Knowledge Articles

General: What sequences of transfers types (HTRANS) can occur on the bus?

Applies to: AHB

Answer

The following examples show some of the sequences of HTRANS that can occur on the bus:

A normal burst of four transfers followed by an IDLE.
N - S - S - S - I

A normal burst of four transfers which includes BUSY transfers.
N - S - B - S - B - S - I

A burst of four transfers followed by another burst.
N - S - S - S - N - S - S - S - I

A single transfer followed by a burst of four transfers.
N - N - S - S - S - I

A single transfer followed by an IDLE
N - I

An undefined length burst which concludes with a BUSY transfer.
N - B - S - B - S - B - I

An undefined length burst which concludes with a BUSY transfer and is followed immediately by another burst.
N - B - S - B - S - B - N - S

See also:

Article last edited on: 2014-02-06 14:34:19

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