在别的网站找到的一点信息，或许有用
在j-link下使用rx 0命令；
解决方法是从一外国网站论坛上看到得，以下是外国论坛的原文；
Obviously J-Link can "talk" to your chip.
The problem is that it can not halt the chip for some reason.
Most likely cause is that the target CPU has no clock or that
it is performing a memory access which halts the CPU indefinetly.
Can you
a) Check if the CPU has a clock
b) Check if there is a "WAit" Signal which may be active
If this does not help, try "rx 0" from J-Link Commander as follows:
SEGGER J-Link Commander V3.78a ('?' for help)
Compiled Dec 4 2007 22:18:44
DLL version V3.78a, compiled Dec 4 2007 22:18:35
Firmware: J-Link compiled Dec 03 2007 17:15:31 ARM Rev.5
Hardware: V5.30
S/N : 1
Feature(s) : RDI, FlashBP, FlashDL, JFlash, GDB
VTarget = 3.306V
Info: TotalIRLen = 4, IRPrint = 0x01
JTAG speed: 30 kHz
Found 1 JTAG device, Total IRLen = 4:
Id of device #0: 0x3F0F0F0F
Found ARM with core Id 0x3F0F0F0F (ARM7)
J-Link>speed 2000
JTAG speed: 2000 kHz
J-Link>rx 0
Reset delay: 0 ms
Reset type NORMAL: Using RESET pin, halting CPU after Reset
Info: TotalIRLen = 4, IRPrint = 0x01
Info: Resetting target using RESET pin
J-Link>
原文链接：
http://bbs.embedsky.net/viewthread.php?tid=2828
