有看过SMAC3.1C的Lighting Demo程序的吗 Lighting, Demo, 程序

有看过SMAC3.1C的Lighting Demo程序的吗

它的Lighting_demo_controller程序
它的注释说PB0不是可以唤醒MCU吗
但我发现它的PB1也能唤醒MCU？？？
 

/**************************************************************
  *    Main Loop, repeated now forever
  **************************************************************/
  for(;;)
  {
    u8DeviceLed = 0x05; /* LEDs all off */
    u8LightLed = 0x05;
    LedDrive(u8DeviceLed);
      u8AppStatus = 0;
    /* Enable keyboard irq. Depressing PB0 will cause a wake up */
    KBI1SC_KBIMOD = 0;
    PB0IE =1;
    KBI1SC_KBI1E = 1;
    /* MC13192 Reset mode and MCU STOP3. */
    /* This is the stand-by low power mode. */
    UseMcuClock(); /* MCU internal clock selected since we'll lose our external clock */
     MC13192ContReset(); /* Place the MC13192 into Reset mode */
    //KBDWAIT(); /* Wait for PB1 to be depressed. Note: requires Rev C GB60 board */
    /* PB0 depressed */
    u8Dsn++; /* increment the data sequence number */
    if (u8Dsn == 0xFF) /* 0xFF is reserved and used at startup only for devices */
    {
        u8Dsn = 0x00;
    }
    /* Restart to external clock appx. 10.8mS */
    MC13192Restart(); /* Bring the MC13192 into the desired Idle condition. */
     RadioInit();
      MLMESetChannelRequest(0); /* Set the selected u8Channel. */
    MLMESetMC13192ClockRate(1); /* Back to 8MHz CLKo */
    UseExternalClock(); /* Use external accurate clock */
   
    u16OldTime = MCUReadTmr1();
    u16NewTime = u16OldTime;
    u8ToCount = 0;
并且从这一段程序来看
好象MCU是自动唤醒的？？？请斑竹指点一下

那/* Enable keyboard irq. Depressing PB0 will cause a wake up */
这句话怎么解释呢？谢谢斑竹

谢谢seuafu2005
但是还有一点疑问：
本程序开始放开了KBI中断
在让MC13192 Reset mode and MCU STOP3
接着Bring the MC13192 into the desired Idle condition并且MCU被唤醒
我用的是13192SARD的模块
问题是：1.前面程序并没指明是哪个按键唤醒啊
2.唤醒后，程序从哪儿开始执行 是从u8Dsn++; /* increment the data sequence number */这儿吗？？
3.斑竹能不能具体说说KBDWAIT(); 的功能，用不用它有何影响？

非常感谢！！！