jTag debugging Introduction | Debugging Linux Kernel and Linux Device Driver | Youtube

Published: 01 January 1970
on channel: Linux Kernel Foundation

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An inexpensive remote debugger can be run on a workstation or PC to assist with software debug.

Boundary-scan technology is also used for emulation. The emulator front-end acts as the scan manager by controlling the delivery of scan information to and from the target and the debugger window.
JTAG also allows the internal components of the device (the CPU, for example) to be scanned. This means you can use JTAG to debug embedded devices by allowing access to any part of the device that is accessible via the CPU, and still test at full speed. This has since become a standard emulation debug method used by silicon vendors. JTAG can also provide system level debug capability. Having extra pins on a device provides additional system integration capabilities for benchmarking, profiling, and system level breakpoints.

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