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28388D 看门狗复位



各位大侠:

       我在使用28388D,看门狗复位时,能实现软件复位但是复位后无法重启;必须断电后软件才能启动。下面是我使用的代码:

EALLOW;
WdRegs.WDKEY.bit.WDKEY = 0x0055;
WdRegs.WDKEY.bit.WDKEY = 0x00AA;
WdRegs.WDCR.all = 0x0028;
WdRegs.WDCR.bit.WDCHK = 0;
EDIS;

请问这是什么原因造成的呢?