STM32103vet6不能读RAM问题？

只看该作者 · 2010-7-6 16:59

现象：
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: 200 kHz (Auto)
- Initializing CPU core (Init sequence) ...
- Initialized successfully
- JTAG speed: 200 kHz (Auto)
- Connected successfully
Reading selected sectors ...
- 256 of 256 sectors selected, 1 range, 0x8000000 - 0x807FFFF
- ERROR: RAM check failed @ address 0x20000000.
- ERROR: Write: 0xE7FEBE00 E07CE062
- ERROR: Read: 0xAAAAAAAA AAAAAAAA
- ERROR: (0 bytes of RAM have been checked successfully)
- ERROR: Failed to read back target memory

请问是何种原因造成？