LM3S9B92烧写不成功及FLASH烧写次数限制

请问9b92 C1版本的FLASH是不是有烧写限制？是多少次？我在网上看到一些说是的100次左右，这说法是否正确？
同时能否解释下下面的问题？谢谢~~~
我下载时提示“Could not power up debug port: Control/Status register reads 000000F0”
用JLINK Commander 得出以下信息：
SEGGER J-Link Commander V4.12 ('?' for help)
Compiled Feb 26 2010 19:23:14
DLL version V4.12, compiled Feb 26 2010 19:22:53
Firmware: J-Link ARMV8 compiled Jun 16 2011 14:52:53
Hardware: V8.00
S/N : 68000019
Feature(s) : RDI, FlashDL, FlashBP, JFlash, GDBFull
Info: TotalIRLen = 4, IRPrint = 0x01
VTarget = 3.345V
****** Error: Could not power up debug port: Control/Status register reads 00000
0F0
No devices found on JTAG chain. Trying to find device on SWD.
Info: Found SWD-DP with ID 0x2BA01477
WARNING: No matching core found. Selec ting default core (Cortex-M3).
****** Error: Parity error (Data = 0xFFFFFFFF, ReceivedParity = 1)
No device found on SWD.
Cortex-M3 identified.
JTAG speed: 1000 kHz