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   What does APB stand for?

   • The Advanced Peripheral Bus (APB) is part of the Advanced Microcontroller Bus Architecture (AMBA) protocol family.

   Documentation – Arm Developer

   developer.arm.com/documentation/ihi0024/c/Introduction/About-the-APB-protocol

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   What is AMBA 4 APB?

   • APB is highly compact, low power, and allows configuration and low-bandwidth traffic to be isolated from high-performance interconnects. AMBA 4 APB is fully backward compatible with AMBA 3 APB, allowing the use of existing APB peripherals. The Q-Channel and P-Channel LPI protocol is designed to manage clock and power features of SoC components.

   AMBA 4 / AMBA 3 / AMBA 2 - Arm

   www.arm.com/architecture/system-architectures/amba/amba-4

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   What is APB & AHB?

   • The APB is a simplified interface designed for low bandwidth peripherals that do not require the high performance of the AHB or the ASB. These include components like a UART, low-frequency GPIO, and timers. Figure 1. AMBA Bus including AHB/ASB and APB (taken from AMBA Rev. 2.0) The AHB was a new addition to AMBA in revision 2.0.

   The Advanced Microcontroller Bus Architecture: An Introduction

   www.allaboutcircuits.com/technical-articles/introduction-to-the-advanced-microcontroller-bus-architecture/

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   What is the difference between APB and AMBA 2?

   • APB supports the low-bandwidth transactions necessary to access configuration registers and data traffic through low-bandwidth peripherals. AMBA 2 is an older generation of the on-chip bus architecture that added the AMBA High-performance Bus (AHB), which is a single clock-edge protocol.

   AMBA 4 / AMBA 3 / AMBA 2 - Arm

   www.arm.com/architecture/system-architectures/amba/amba-4

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2. developer.arm.com › About-the-APB-protocolDocumentation - Arm Developer

   developer.arm.com › About-the-APB-protocol

   The AMBA APB protocol is optimized for minimal power consumption and reduced interface complexity to support peripheral functions.

   • APB Revisions

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3. documentation-service.arm.com › static › 63fe2c1356AMBA APB Protocol Specification - ARM architecture family

   documentation-service.arm.com › static › 63fe2c1356

   The APB interface is not pipelined and is a simple, synchronous protocol. Every transfer takes at least two cycles to complete. The APB interface is designed for accessing the programmable control registers of peripheral devices. APB peripherals are typically connected to the main memory system using an APB bridge.

4. en.wikipedia.org › wiki › Advanced_MicrocontrollerAdvanced Microcontroller Bus Architecture - Wikipedia

   en.wikipedia.org › wiki › Advanced_Microcontroller

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   The Arm Advanced Microcontroller Bus Architecture (AMBA) is an open-standard, on-chip interconnect specification for the connection and management of functional blocks in system-on-a-chip (SoC) designs.

5. medium.com › @iamRadhaKulkarni › understanding-theUnderstanding the AMBA Protocol: APB, AHB, and ASB Explained

   medium.com › @iamRadhaKulkarni › understanding-the

   Jun 18, 2023 · The Advanced Microcontroller Bus Architecture (AMBA) is an open standard developed by ARM for connecting and managing functional blocks in a System-on-Chip (SoC).

   • Author: Radha Kulkarni

6. www.allaboutcircuits.com › technical-articlesThe Advanced Microcontroller Bus Architecture: An Introduction

   www.allaboutcircuits.com › technical-articles

   • Cached

   Jun 2, 2019 · The AMBA specification was developed by ARM and has become the de facto standard for interfacing components in an SoC. While AMBA is currently on its 5 th revision and has evolved significantly over time, legacy implementations are widely used and remain relevant.

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7. developer.arm.com › documentation › dvi0010Documentation – Arm Developer

   developer.arm.com › documentation › dvi0010

   The APB is designed to be a secondary bus to ASB, connected by a bridge (which limits the ASB loading). APB is a much simpler bus and has a low power focus: data access is controlled by select and strobe only (i.e. no clock, and thereby reducing power)

8. www.arm.com › architecture › system-architecturesAMBA 4 / AMBA 3 / AMBA 2 - Arm

   www.arm.com › architecture › system-architectures

   • Cached

   APB is highly compact, low power, and allows configuration and low-bandwidth traffic to be isolated from high-performance interconnects. AMBA 4 APB is fully backward compatible with AMBA 3 APB, allowing the use of existing APB peripherals.