ADUC7020用JTAG烧写程序后再无法烧写，DEBUG模式也无法进入？怎么解决？

由于程序有BUG导致用JTAG烧写程序后，再无法烧写，DEBUG模式也无法进入？怎么办？
KEIL信息如下：
VTarget = 3.228V
Info: TotalIRLen = 4, IRPrint = 0x01
Info: TotalIRLen = 4, IRPrint = 0x01
Info: RTCK seems to be bridged with TCK
Info: Auto JTAG speed: 8000 kHz
***JLink Warning: PC of target system has unexpected value of 0xFFFFFFD8 after reset.
***JLink Error: Bad JTAG communication: Write to IR: Expected 0x1, got 0x2 (TAP Command : 12) @ Off 0x14.
DLL version V4.15n, compiled Jun 18 2010 19:55:09
Firmware: J-Link ARM V8 compiled Jul 17 2014 12:31:18
Hardware: V8.00
Info: Could not measure total IR len. TDO is constant high.
***JLink Warning: No matching core found.
Info: Could not measure total IR len. TDO is constant high.
Info: Could not measure total IR len. TDO is constant high.
Info: Could not measure total IR len. TDO is constant high.
Info: Could not measure total IR len. TDO is constant high.
***JLink Warning: No matching core found.
Info: Could not measure total IR len. TDO is constant high.
Info: Failed to halt CPU core before ADI software reset.
Info: Could not measure total IR len. TDO is constant high.
Info: Resetting target using RESET pin
Info: Resetting TRST
Info: CPU no longer halted after stop via DBGRQ: DBGACK = 0, nMREQ  = 0
***JLink Error: Could not find supported CPU core on JTAG chain
1, got 0x2 (TAP Command : 12) @ Off 0x14.
Bad JTAG communication: Write to IR: Expected 0x1, got 0x3 (TAP Command : 12) @ Off 0x14.
JTAG speed: 5 kHz
Full Chip Erase Failed!