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1. www.silabs.com › documents › publicProgramming Internal Flash Over the Serial Wire Debug Interface

   www.silabs.com › documents › public

   Serial Wire Debug (SWD) is a two-wire protocol for accessing the ARM debug interface. It is part of the ARM Debug Interface Specification v5 and is an alternative to JTAG. The physical layer of SWD consists of two lines: SWDIO: a bidirectional data line. SWCLK: a clock driven by the host.

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2. community.silabs.com › s › articleSerial Wire Debug (SWD) - Silicon Labs

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   Jul 9, 2021 · Serial Wire Debug (SWD) is a 2-pin (SWDIO/SWCLK) electrical alternative JTAG interface that has the same JTAG protocol on top. SWD uses an ARM CPU standard bi-directional wire protocol, defined in the ARM Debug Interface v5.

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4. www.silabs.com › documents › publicAN0043: Debug and Trace - Silicon Labs

   www.silabs.com › documents › public

   Debug technology (SWD), specifically the Serial Wire Debug Port (SW-DP) for the EFM32, is used as the interface between the on-chip debug module and the development environment on a computer. SW-DP is a 2-pin debug interface which offers a high performance and low pin count alternative to JTAG.

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5. www.silabs.com › documents › publicAN1011: Standalone Programmer via the SWD Interface

   www.silabs.com › documents › public

   The Serial Wire Debug (SWD) interface is a two-wire interface used by Silicon Labs EFM32 Gecko, EZR32, and EFR32 Wireless Gecko devices. The programmer writes directly to the target device Memory System Controller (MSC) registers over the SWD interface. Future Silicon Labs EFM32/ EFR32/EZR32 devices can be easily added to the programmer.

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6. siliconlabs.my.site.com › community › sSerial Wire Debug (SWD)

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   Serial Wire Debug (SWD) is a 2-pin (SWDIO/SWCLK) electrical alternative JTAG interface that has the same JTAG protocol on top. SWD uses an ARM CPU standard bi-directional wire protocol, defined in the ARM Debug Interface v5. This enables the debugger to become another AMBA bus master for access to system memory and peripheral or debug registers.

7. community.silabs.com › s › articleJTAG and SWD in Series 1 Cortex M4 devices - Silicon Labs

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   Jul 9, 2021 · The Silicon Labs Cortex M4 devices support both JTAG and SWD protocols. A component called SWJ-DP is responsible for selecting one or the other. The default protocol at power-up is JTAG, so one must use the TCK and TMS pins to scan in a key to use the Serial Wire.

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   What is Serial Wire Debug (SWD)?

   • It also explains how to lock and unlock debug access to the MCU to protect the contents of the internal flash and SRAM. Serial Wire Debug (SWD) is a two-wire protocol for accessing the ARM debug interface. It is part of the ARM Debug Interface Specification v5 and is an alternative to JTAG.

   Programming Internal Flash Over the Serial Wire Debug Interface

   www.silabs.com/documents/public/application-notes/an0062.pdf

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   What is SWD V5?

   • It is part of the ARM Debug Interface Specification v5 and is an alternative to JTAG. The physical layer of SWD consists of two lines: Connecting to these pins allow an external device (such as a debug probe) to communicate directly with the Serial Wire Debug Port (SW-DP).

   Programming Internal Flash Over the Serial Wire Debug Interface

   www.silabs.com/documents/public/application-notes/an0062.pdf

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   What is the difference between SW-DP & SWD?

   • SW-DP is a 2-pin debug interface which offers a high performance and low pin count alternative to JTAG. SWD is often used as an acronym for both the SW-DP and SWJ-DP (Serial Wire JTAG Debug Port). The EFM32 does not implement SWJ-DP.

   AN0043: Debug and Trace - Silicon Labs

   www.silabs.com/documents/public/application-notes/AN0043.pdf

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   What is the physical layer of SWD?

   • The physical layer of SWD consists of two lines: Connecting to these pins allow an external device (such as a debug probe) to communicate directly with the Serial Wire Debug Port (SW-DP). The SW-DP in turn can access one or several Access Ports (APs) that give access to the rest of the system.

   Programming Internal Flash Over the Serial Wire Debug Interface

   www.silabs.com/documents/public/application-notes/an0062.pdf

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9. community.silabs.com › s › questionSWD Programming? - community.silabs.com

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   Current configuration - Target Interface is set to SWD in the J-Link Silicon Labs device. Adapter config, Debug Mode: Out. Not sure what to put for part or board. I've tried various combinations. After the chip is written to, debug never breaks on main.