ADUC7023 cannot be burned

programmer : jlink v9

programmer software:JLink_V645a

JTAG interface : TDI   TDO   TMS   TCLK TESET

JTAG is used as a plain GPIO, and the address of 0x800014 is not 0xFFFFFFFF.

All caused by now can not erase the chip to download again,

is there any way to solve it?