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What is AHB AP?
The AHB-AP is a Memory Access Port (MEM-AP) as defined in the ARM Debug Interface v5 Architecture Specification. The AHB-AP is an optional debug access port into the Cortex-M3 system, and provides access to all memory and registers in the system, including processor registers through the SCS.
What is Jlink used for?
J-Link BASE is a USB powered JTAG debug probe supporting a large number of CPU cores. Based on a 32-bit RISC CPU, it can communicate at high speed with the supported target CPUs. J-Link is used around the world in tens of thousand places for development and production (flash programming) purposes.
How do you debug an interface?
Internal debugging interfaces are based on simple bus design, making it scalable and easy to develop additional test logic for other parts of the chip or SoC. It allows multiple trace data streams to be collected in one trace capture device and separated back into multiple streams on the debug host.
Which is the logical interface for the ARM Debug Interface?
The Arm Debug Interface (ADI) is a specification of both the hardware interface and the logical interface for debugging between a host and one or more devices. Currently, most processors are implementing ADIv5 (specified in Arm IHI0031E), while the newer ADIv6 (see Arm IHI0074C) is being slowly phased in.
Which is Serial Wire Debug for ARM core devices?
Serial Wire Debug (SWD) While the JTAG-DP is a common and familiar example of a debugging interface, most relevant to our discussion is the JTAG alternative defined for Arm devices, the Arm Serial Wire Debug (SWD). SWD was developed as a two-wire interface for Arm-core devices with limited pin counts.
What is the debug interface for adiv5 architecture?
ADIv5 defines a standard debug interface for debug components in an embedded SoC. This specification is written for system designers and engineers who are specifying, designing or implementing a debug interface to the ADIv5 architecture specification.
How does the Debug Access Port ( DAP ) work?
Instead, a debug interface module is decoupled from the core, and a bus interface called the Debug Access Port (DAP) is provided at the core level. Through this bus interface, external debuggers can access control registers to debug hardware as well as system memory, even when the processor is running.