APB suits simple register accesses; AHB-Lite pipelines address and data; AXI separates channels. Choose for the subsystem's needs, not a newer-is-better rule.
APB two-phase access: SETUP then ACCESS, wait on PREADY.
AHB pipelined address/data phases with HREADY stretch.
Bridge selection: APB for low-power peripherals, AXI for performance paths.
Builds on handshake fundamentals. The next topic contrasts this pipelining with AXI's independently handshaken channels.
No. It must pass through SETUP; continuous selection does not eliminate that phase.
Concepts — Trace APB setup/access and AHB-Lite address/data association.
Integration — Choose a control path from traffic and service requirements.
Debug — Locate the missing decode, phase or completion event.
Interview — Explain the trade-offs using a bounded workload.