arm

Arm architecture specifies a set of rules that dictate how the hardware works when a particular instruction is executed.

It is a contract between the hardware and the software, defining how they interact with one another.

https://www.allaboutcircuits.com/author/stephen-st.-michael

https://www.allaboutcircuits.com/technical-articles/introduction-to-the-advanced-extensible-interface-axi/ https://www.allaboutcircuits.com/technical-articles/what-are-axi-interconnects-tutorial-master-slave-digital-logic/

ARM bit-banding

ARM bit-banding is a hardware feature in select Cortex-M processors (like Cortex-M3 and M4) that maps a single bit of memory to a full 32-bit word in a separate "alias" region. This allows for atomic, single-cycle bit manipulation without needing traditional read-modify-write instructions (like AND/OR masks)

https://medium.com/@levinet.nicolai/strengths-and-weaknesses-for-bit-banding-in-arm-cortex-m-58217cd12260