外部复位，计数抑制，键盘禁用。

External reset, count inhibit, keyboard disable.

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然后，在正常工作中，可以配置MCLR引脚为外部复位或仅作为输入引脚。

Thereafter, in normal operation, you can configure the MCLR pin either as an external reset or as an input-only pin.

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然后，当使外部复位信号无效时，生成一个延迟的复位信号并将其加到DRAM控制器以将其复位。

Then, when the external reset signal is disabled, a delayed reset signal DLYRST is generated and applied to the DRAM controller so that it is reset.

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