STM32F103R8T6 SWD problem

Posted on November 01, 2015 at 08:19

Hello everyone,

I am making PCB with STM32F103R8T6 but I have problem with SWD. I connect PCB with ST Link Mini via SWD

SWCLK <--> PA14

SWDIO <--> PA13

RST <--> NRST

SWIM <--> PB3

GND <--> VCC

3V3 <--> VDD

In Keil, it can recognize SW Device but I cannot download flash it say Flash Download failed - ''Cortex - M3''

However, if I tried to erase full chip I can download flash but after ''Programming Done'' it shows

Contents mismatch at: 08000000H (Flash=FFH Required=60H) !

......

Contents mismatch at: 08000063H (Flash=FFH Required=08H) !

and then''Flash Download failed - ''Cortex - M3''''

In this case, if I unplug power and plug power again PCB work.

Can you give me some advise to solve my problem?

Thank you very much.

This topic has been closed for replies.

ST Technical Moderator

Posted on November 10, 2015 at 11:04

Hi trung_thanh.nguy.001,

I think that PB3 is not required for SWD configuration.

You may refer to the schematic of

for example to check the connections of STLink component.

I recommend you also to connect using the STLink Utility and do some operations using its graphical interface.

-Mayla-

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