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 ?
AHB Slave and Master standard and optional pinsets

Note: This was originally posted on 30th November 2012 at http://forums.arm.com Hello, I have a problem finding out which of the AHB slave-side pinsets are optional and which are standard from the specification...
AHB Slave and Master standard and optional pinsets

Note: This was originally posted on 30th November 2012 at http://forums.arm.com Hello, I have a problem finding out which of the AHB slave-side pinsets are optional and which are standard from the specification...
simulate 9 bit for master/Slave

Hi at all In this first project with LPC 2364 i must simulate the 9 bit in master slave function similar at rs485 bus. This processor not have this feature, is posible emualte this with parity...
simulate 9 bit for master/Slave

Hi at all In this first project with LPC 2364 i must simulate the 9 bit in master slave function similar at rs485 bus. This processor not have this feature, is posible emualte this with parity...