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JTAG vs SWD debugging - Electrical Engineering Stack Exchange JTAG (Joint Test Action Group) was designed largely for chip and board testing It is used for boundary scans, checking faults in chips boards in production Debugging and flashing micros was an evolution in its application over time JTAG is in use for multiple microcontroller processor architectures aside from ARM General Discussion
What is a JTAG? - Electrical Engineering Stack Exchange Additionally, JTAG is sometimes mis-used as a verb meaning, generically, "to debug test" a thing A person "JTAG'ing something" may actually be using a different protocol that the device's manufacturer has overlapped with the physical JTAG pins (i e SWD)
Does there exist a general purpose JTAG communicator? The Virtual JTAG User Guide notes that The Virtual JTAG Intel FPGA IP core Tcl API requires an Intel programming cable Designs that use a custom controller to drive the JTAG chain directly must issue thecorrect JTAG IR DR transactions to target the Virtual JTAG Intel FPGA IP coreinstances
What should be done with the JTAG TRST pin when target chip has only . . . I get the difference between the JTAG TRST (Tap Reset) and SRST (System Reset) signals If the target chip has these two pins, its wiring to a 20-pin JTAG connector is obvious: Basically you just connect TRST to TRST and SRST to SRST Each of the signals should have a pull-up resistor That's it However, what if the target chip has no TRST pin?
How to connect Multiple JTAG devices? - Electrical Engineering Stack . . . JTAG can support a star topology, but this relies on the individual nodes having control to tri-state their TDO drivers (which can then be wire-ORed) It is possible to switch just the TMS inputs to each node, or for the nodes to implement a chip-select register within their JTAG interface
Programming microcontrollers: JTAG, SPI, USB oh my!? I've noticed, with regards to microcontrollers, there are several way to program them I am sorta familiar with USB as my Arduino's can be programmed via USB What is a JTAG or SPI interface?
jtag - How to flash an Arduino Due (ARM Cortex-M) using openocd . . . You'd want, as you tagging indicates, a jtag debugging port – or, since this is an ARM microcontroller – probably a swd debugging port to talk to OpenOCD doesn't "talk" Arduino bootloader protocol, and even if it did, it'd be less useful than the actual SWD interface on the ATSAM itself
Program FPGA without JTAG? - Electrical Engineering Stack Exchange If you want to program the FPGA directly, such as when you are doing development work, you will use JTAG If you want to program an FPGA that uses external memory (which was the norm until recently) then you need only program the external memory device (which generally have their own programming protocols not using JTAG) and then reset the FPGA so that it does a load from memory I suppose it