Jlink、jflash都下载不成功，但是可以识别芯片ID，STMF405的片子

gxjgxj123

KEIL提示
Device: STM32F405RGTx
VTarget = 3.272V
State of Pins:
TCK: 0, TDI: 0, TDO: 0, TMS: 1, TRES: 1, TRST: 0
Hardware-Breakpoints: 6
Software-Breakpoints: 8192
Watchpoints:          4
JTAG speed: 100 kHz

Erase Failed!
Error: Flash Download failed  -  "Cortex-M4"
Flash Load finished at 16:21:50
JFLASH提示：
ERROR: Failed to read back target memory
Disconnecting ...
- Disconnected
Reading target memory (0x08000000 - 0x080FFFFF) ...
- Connecting ...
    - Connected successfully
- RAM tested O.K.
- ERROR: PC of target system has unexpected value after blank checking. (PC = 0x200000EE)!
---------------------------------------------------------------------- Registers -------------------------------------------------------------------------------------