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CC2541自动复位问题请教

Other Parts Discussed in Thread: CC2541, AFE4400

我用cc2541 IO口模拟了spi,同时控制128*64的屏幕和AFE4400, afe4400每20ms读一次处理.

按一次按键(中断方式)切换一次屏幕显示.

问题来了,如果不停按按键切换屏幕,2541就复位了.(开门狗未开启)

我试过这个复位对2541的复位寄存器没有影响,复位寄存器存的还是上次复位原因.

用内部集成的spi控制器没问题

增加读取4400的周期(比如40ms)也没问题

这是什么原因引起的复位呢.