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Why AWLEN signal is optional for master and required for slave in AXI4 protocol ?

Why AWLEN signal is optional for master in AXI4 protocol ? If it is optional for master then how slave will get that signal because it is required for slave ?

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Colin Campbell 11 months ago +2 verified

AWLEN is described as "optional" only if the manager design is going to use the "Default" value of all zeroes, so a single transfer. See table A9.3 in the AXI spec, where it states... "The following...

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TillyGough 11 months ago

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TillyGough 11 months ago

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0 Colin Campbell 11 months ago in reply to TillyGough

AWLEN is the AW channel "length" signal, indicating how many transfers will be in this transaction. It has nothing to do with an address width enable.
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