STM32F103C8T6，keil MDK472 SWD下载模式或调试总是出现Error: Flash Download failed - “Cortex-M3“解决

  ARM 32-bit Cortex-M3 Microcontroller, 72MHz, 64kB Flash, 20kB SRAM, PLL, Embedded Internal RC 8MHz and 32kHz, Real-Time Clock, Nested Interrupt Controller, Power Saving Modes, JTAG and SWD, 3 Synch.

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