之前是可以正常下载的，在测试参数过程中，突然就不能擦除了。下载提示信息* JLink Info: Device "STM32F205VC" selected (256 KB flash, 64 KB RAM).
JLink info:
------------
DLL: V4.68a, compiled Apr 12 2013 13:26:50
Firmware: J-Link ARM V8 compiled Nov 14 2012 22:34:52
Hardware: V8.00
S/N : 286370559
Feature(s) : RDI,FlashDL,FlashBP,JFlash
* JLink Info: Found SWD-DP with ID 0x2BA01477
* JLink Info: Found SWD-DP with ID 0x2BA01477
* JLink Info: TPIU fitted.
* JLink Info: ETM fitted.
* JLink Info: FPUnit: 6 code (BP) slots and 2 literal slots
* JLink Info: Found Cortex-M3 r2p0, Little endian.
ROMTableAddr = 0xE00FF003
Target info:
------------
Device: STM32F205VC
VTarget = 3.241V
State of Pins:
TCK: 0, TDI: 0, TDO: 0, TMS: 1, TRES: 1, TRST: 1
Hardware-Breakpoints: 6
Software-Breakpoints: 8192
Watchpoints: 4
JTAG speed: 2000 kHz
Erase Failed!
测试的时候，不小心短接了电源3.3V和7.5V的两条线，只是一瞬间，这样芯片是被烧坏了吗？
请问不能擦除这是什么原因。非常感谢。 | 
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