hello
My chip can't switch from JTAG to SWD by using the SWD command of j-link commander v6.98c. The reason is that the chip only supports the mode of dormant operation (Figure B5-4), but doesn't support the mode of 0x79e7 (Figure B5-1). Doesn't JLINK support the mode of dormant now? Or how can I use JLINK to switch my chip from JTAG to SWD。
thank you
![](https://forum.segger.com/index.php/Attachment/4675-2-png/?s=8e820b9b7a6720fd4f757af18c978b8bfb9fbe04)
![](https://forum.segger.com/index.php/Attachment/4674-1-png/?s=8e820b9b7a6720fd4f757af18c978b8bfb9fbe04)
appendix
1. Switching method of b5-1 mode
![](https://forum.segger.com/index.php/Attachment/4676-11-png/?s=8e820b9b7a6720fd4f757af18c978b8bfb9fbe04)
2. Switching method of B5-4 mode
![](https://forum.segger.com/index.php/Attachment/4677-22-png/?s=8e820b9b7a6720fd4f757af18c978b8bfb9fbe04)
![](https://forum.segger.com/index.php/Attachment/4678-33-png/?s=8e820b9b7a6720fd4f757af18c978b8bfb9fbe04)
The above screenshot is from the file:debug_interface_v6_0_architecture_specification_IHI0074C.pdf
My chip can't switch from JTAG to SWD by using the SWD command of j-link commander v6.98c. The reason is that the chip only supports the mode of dormant operation (Figure B5-4), but doesn't support the mode of 0x79e7 (Figure B5-1). Doesn't JLINK support the mode of dormant now? Or how can I use JLINK to switch my chip from JTAG to SWD。
thank you
appendix
1. Switching method of b5-1 mode
2. Switching method of B5-4 mode
The above screenshot is from the file:debug_interface_v6_0_architecture_specification_IHI0074C.pdf