Posting to ask about the specific connection method of JTAG and SWJ

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Posting to ask about the specific connection method of JTAG and SWJ [Copy link]

As the title says, where is the explanation about jtag? I have looked at several pictures
of the STM32F105RCT6 I am using now , and found that they are not the same (seeking pictures)

shizibaihe

I have a schematic diagram of 107 here , you can take it for reference.

MDV_STM32F107 schematic.pdf (198.08 KB)

Downloads:112

2010-4-13 12:20

quq

Take a look at this application note published by ST: AN2586 STM32F10xxx hardware development: getting started

jackhui

SWD only needs to connect three signal lines: RESET/SWDIO/SWCLK, plus GND.
VCC can be connected or not.

hxjd

SWD only needs to connect three signal lines: RESET/SWDIO/SWCLK, plus GND.
VCC can be connected or not.

What I am facing now is that SWD only needs to connect SWDIO/SWCLK/VCC, plus GND
Vcc must be connected, if Vcc is not connected J-Link will not recognize

duyeqiang1215

                                 If VCC is not connected, a separate power supply is required instead of EP868 and J-link.

yinyiwei

                                 If your board is already powered by itself, but Jlink still doesn't recognize it, it just means that Jlink didn't handle it properly.

laopo163

                                 I reset it and it works fine without connecting it.

y.yan

                                 LS can try to remap the JTAG pins once the program is running, haha