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Course contents

  • How to Use This Course
  • Protocol Metrics Reference
  • Protocols Glossary
  • Reading Path
  • Protocol Fundamentals25
  • AMBA Family (APB / AHB / AXI)17
    • APB & AHB Basics
      • APB & AHB Basics: Concepts
      • APB & AHB Basics: Integration
      • APB & AHB Basics: Debug
      • APB & AHB Basics: Interview
    • AXI Channels & Transfers
    • AXI-Lite & AXI-Stream
    • AMBA Integration Debug
    • AMBA Family (APB / AHB / AXI): Tricky Q&A
  • Coherence Fabrics (ACE / CHI)17
  • Memory Interfaces (DDR / LPDDR / HBM)17
  • PCIe & CXL17
  • Embedded Peripherals (I2C / SPI / UART)17
  • High-Speed I/O (USB / Ethernet / MIPI)17
  • Protocol Verification & Compliance21
  • Protocols Interview Prep5
  • Interface Protocols Cheatsheet
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←APB & AHB Basics
  1. Topics
  2. Bus Protocols
  3. AMBA Family (APB / AHB / AXI)
  4. APB & AHB Basics
  5. APB & AHB Basics: Interview

Interface ProtocolsAll levels

APB & AHB Basics: Interview

Interview for APB & AHB Basics.

Interview drills

When would you choose APB over AXI-Lite?

Check yourself When would you choose APB over AXI-Lite?

Choose APB when its serial setup/access path meets the register traffic and latency requirement at an acceptable bridge/clocking cost. Choose Lite when independent address/data channels and the planned buffering fit the integration and service needs. Neither is selected by the peripheral's name alone, and nominal protocol choice does not establish measured throughput or power.

Common trap: Saying APB is always better because it's simpler.

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See also

  • APB & AHB Basics: Concepts
  • APB & AHB Basics: Integration