怎么用JLINK下载程序到STM32F103C8T6里面

[x_raymond]

朋友那里借来一块STM32F103C8T6的实验板，板上只引出了TMS、TCK、SWD和GND，用JLINK调试时发现能够连接上芯片，但不能擦除和下载。板子刚买回来不久，里面自带的程序能够运行，硬件没有问题。TMS连到JLINK的第7脚，TCK连到JLINK的第九脚，SWD连到JLINK的第13脚
自己下载HEX文件时JLINK的提示：
Connecting ...
- Connecting via USB to J-Link device 0
- J-Link firmware: V1.20 (J-Link ARM V8 compiled Jun 19 2012 11:29:30)
- JTAG speed: 200 kHz (Auto)
- Initializing CPU core (Init sequence) ...
- Initialized successfully
- JTAG speed: 2000 kHz (Auto)
- Connected successfully
Auto programming target (13220 bytes, 1 range) ...
- Unsecure chip ...
- Chip unsecured successfully
- Erasing affected sectors ...
- ERROR: RAM check failed @ address 0x20000000.
- ERROR: Write: 0x03020100 07060504
- ERROR: Read: 0xAAAAAAAA AAAAAAAA
- ERROR: (0 bytes of RAM have been checked successfully)
- ERROR: Failed to erase sectors
- ERROR: Failed to auto program target
JLINK的设置：


请问是哪里出了错，一直困惑着，怎么也没找出问题在哪。求各位高手指点指点。。。

[Simality]

你的引脚命名放一边，SWD模式的连接方式如下 STM32F103C8T6 <-------------> JLINK #34 PA13/SWDIO <-------------> #7 TMS #37 PA14/SWDCLK <-------------> #9 TCK #7 RESET <-------------> #15 nSRST

[骁Captain]

仔细检查连线，90%是硬件上的问题

[默寞]

用可能是频率太高，降到500K以下试试

[qianlisen2009]

硬件引脚、复位、时钟、boot配置