AMBA

Different AMBA buses are:
1. AMBA 1 Advanced System Bus (ASB) [1996]
2. AMBA 1 Advanced Peripheral Bus (APB) [1996]
3. AMBA 2 High-performance Bus (AHB) - widely used on ARM Cortex-M based designs
4. AMBA 3 AMBA Extensible Interface (AXI) [2003]
5. AMBA 4 AMBA Extensible Interface 4 (AXI4) [2010]
6. AMBA 4 AXI Coherency Extensions (ACE) [2011]
7. AMBA 5 Coherent Hub Interface (CHI) [2013]



Reference:
https://en.wikipedia.org/wiki/Advanced_Microcontroller_Bus_Architecture
https://www.doulos.com/knowhow/