EM78P451S WDT wakeup 的设定与使用

            ;----------------------------------------------------------------------;
            Wdt_Start:
                    MOV     A, @0b00000000
                    IOW     Port5              ; 设置Port5口输出
                    BS      Port5, num         ; Port5.1输出脉冲
                    MOV     A, @255            ; 等待（P5.1可接LED灯）
                    CALL    Wdt_Delay
                    BC      Port5, num
            ;----------------------------------------------------------------------;
                    CONTR
                    AND     A, @0b11110000  ; 保留不需要设置的状态位
                    OR      A, @0b00001011  ; 将分频器分配给WDT，预除数设为16
                    CONTW
                    WDTC
                    MOV     A, @0b00110001  ; 打开看门狗，避免进入SLEEP2，禁止
                    IOW     IOCE            ; 禁止引脚唤醒功能

                    IOR     IOCE
                    AND     A, @0b11101111  ; 进入SLEEP2
                    IOW     IOCE
                    NOP
            LOOP：
                    NOP
                    JMP     LOOP
                    END

            3.B WDT唤醒IC in sleep1
            Port5    ==      0x05           ; Port5端口
            IOCE     ==      0x0E           ; WDT控制寄存器
            Wdt_buf  ==      0x20           ; 延时缓冲器
                     Num     ==      1
            ;----------------------------MAIN
            PROGRAM------------------------------;
                    ORG     0XFFF
                    JMP     Wdt_Start
                    ORG     0x10
            ;----------------------------------------------------------------------;
            Wdt_Delay:
                    MOV     Wdt_buf, A
            Wdt_Delay_Loop:
                    DJZ     Wdt_buf
                    JMP     Wdt_Delay_Loop
                    RET
            ;----------------------------------------------------------------------;
            Wdt_Start:
                    MOV     A, @0b00000000
                    IOW     Port5              ; 设置Port5口输出
                    BS      Port5, num         ; Port5.1输出脉冲
                    MOV     A, @255            ; 等待（P5.1可接LED灯）
                    CALL    Wdt_Delay
                    BC      Port5, num
            ;----------------------------------------------------------------------;

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