Questions tagged [jtag]
JTAG is an interface that allows 1) testing of inter-chip connections 2) programming of Flash, microcontroller and FPGA devices.
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Reference for pinout out of Segger EDU target board?
I'm in the middle of a board design where the processor uses the segger ten pin pinout. For example this debugger from adafruit. I can't find a good pinout of the connector that shows the orientation ...
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ARM SWD Programming Problems
I am trying to erase a NRF52840 and the erasing fails. This is the relevant schematics:
Notice that SWDIO is tied to the unused P1.01 for ease of placement and routing. Similarly SWDCLK is tied to P1....
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Why was IEEE 1532 withdrawn?
Official status of IEEE 1532 2002 is "Inactive-Withdrawn Standard" as it is stated here.
Analyzing the standards IEEE 1149.1 2001 and 2013 (and some version of 1149.7 and 1149.4) I have come ...
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Lattice FPGA - JTAG Programming 6Pin VS 10Pin
I'm using a Lattice MachXO3LF FPGA, specifically the LCMXO3LF-4300E-5MG121I, and I want program it using JTAG and the HW-USBN-2B programming cable from Lattice. In the Programming Cable Users Guide, ...
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How to turn the FT2232H to the FlashPro5?
There is a TEM0001 devboard with integrated programmer which based on the FT2232 chip and recognize by Libero as FlashPro5 and works with PORT A.
There is a topic where tells how to config a 93C56 ...
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[iMX93evk]:OpenOCD throws "JTAG scan chain interrogation failed: all ones" error
I am trying to enable jtag debugging via openocd on imx93evk, executing the below command
openocd.exe -s share\openocd\scripts -f interface/ftdi/imx93-evk.cfg -f board/imx93-evk.cfg
however I am ...
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AC-JTAG Capacitor Value for differential signal testing
How to compute the value of AC-coupling capacitor to be used in AC-JTAG for testing high-speed differential signal?
Can anyone give a more detailed insights on the proper consideration when ...
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MSP430 programming JTAG
For programming MSP430 MCUs through JTAG, is this Schematic correct? I look for a reference design to make sure it will work:
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How to fix erased On-Board Usb-Blaster FPGA (MAX II EPM240T100C3 on board Terasic DE10-Lite)
I have Terasic DE10-Lite board (with Altera MAX10 fpga), which use Altera Max II EPM240T100C3N (and usb-b + ftdi chip) for on-board usb-blaster logic. After explore 8 pins jtag holes on the board, i ...
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What is the standard behavior when a JTAG instruction is violated?
How does the IEEE-1149 standard regulates the TAP-controller behavior if the instruction register in the SELECT-DR or CAPTURE-DR states contains a value that does not correspond to any instructions?
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Getting "Target not found" after programming an STM32H755 using an external debugger
I used to program and debug using the USB port on my STM32H755 Nucleo-144.
After flashing the code with JTAG, I can't connect the board to my PC anymore; it says "No target found". Is there ...
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How does STM32 know if I'm using SWD or JTAG
My curiosity got the best of me so I'm hoping someone here can help educate me. I'm using a STM32 (STM32F101C8Tx to be precise), which supports both JTAG and SWD. Within STM32CubeIDE I can switch ...
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How to config Channel A/B of FTDI FT4232H to JTAG
I'm new with FT4232H. I just make for myself a FT4232H device with 4 channels UART. (Custom board for learning and researching)
And I want change channel A and B to JTAG for debugging STM32 using JTAG ...
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Why do I need to push into TDI in reverse order on the JTAG?
There is 2 JTAG TAP's R5's TAP and CS400's TAP.
the TDI is connected with R5 then CS400 is TDO Such as TDI->R5->CS400->TDO.
For example, IDCODE code is 1110 and the BYPASS command code is ...
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Is there a limit to pushing to Shift-IR in JTAG?
I'm trying to understand the behaviour of JTAG with ARM.
In particular, there is a Shift-IR stage in the JTAG as shown below,
As far as I know, at this Shift-IR stage, we can push instructions like ...
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