为什么我的J-link无法对NORflash进行烧写·请大神指点啊！！！

我的mini2440和同学一起买的，他的可以用Jlink烧写，但是我的不行，开始以为是Jlink的问题，后来改用他的Jlink烧写也出现了同样的问题··非常着急··是我的板子坏了吗？？？

注意S2开关位置

我是新手··按照视频教程一步步来的····烧写U-boot到NORflash····前面都还可以进行····就是点击program后··先擦除还可以运行··然后就会提示我错误，希望有大神能给予我指引啊··很担心是板子的问题··

我们没有提供过教程，建议你按照手册来做，手册使用的是H-jtag工具


返修可以联系卖家，一般是不会有问题的，大多是不熟悉操作不对导致的。

- Data file opened successfully (261148 bytes, 1 range, CRC = 0xCCB40ED3)
Connecting ...
- Connecting via USB to J-Link device 0
- J-Link firmware: V1.20 (J-Link ARM V8 compiled Dec  1 2009 11:42:48)
- JTAG speed: 8000 kHz (Auto)
- Initializing CPU core (Init sequence) ...
    - Initialized successfully
- JTAG speed: 8000 kHz (Auto)
- J-Link found 1 JTAG device. Core ID: 0x0032409D (ARM9)
- Flash ID (Chip 0) = 0x12249 (Verified)
- Connected successfully

连接时正常的···
- JTAG speed: 8000 kHz (Auto)
- J-Link found 1 JTAG device. Core ID: 0x0032409D (ARM9)
- Flash ID (Chip 0) = 0x12249 (Verified)
- Connected successfully
Opening data file [E:\嵌入式学习资料\mini2440资料\【申嵌视频】-S1\【申嵌视频】1 体验篇\tools\JLink\JLink烧写NOR Flash\u-boot.bin] ...
- Data file opened successfully (261148 bytes, 1 range, CRC = 0xCCB40ED3)
Programming target (261148 bytes, 1 range) ...
- RAM tested O.K.
- Erasing affected sectors ...
    - Erasing sector 2, 3
    - Erase operation completed successfully
- ERROR: Could not transfer JTAG data.
- ERROR: Timeout while programming, core does not stop
- ERROR: Failed to program target
WARNING: Supply voltage too low, disconnecting target!
Disconnecting ...
- Disconnected
之后就会这样报错··到底是什么原因啊 ，电压不够吗？？

没有用过jlink，不懂