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SoC Design and Simulation forum Why AWLEN signal is optional for master and required for slave in AXI4 protocol ?

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

hk_007 over 2 years ago

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 over 2 years 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...