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F28027的GPIO32 GPIO33口无法正确响应外部中断

我使用F28027的GPIO32 和 GPIO33口作为外部中断源发现无法正确响应,使用其他的一些GPIO口就可以,请问是这两个口需要特殊设置什么吗

我的程序如下

    GPIO_setPullUp(myGpio, GPIO_Number_32, GPIO_PullUp_Enable);

    GPIO_setMode(myGpio, GPIO_Number_32, GPIO_0_Mode_GeneralPurpose);

    GPIO_setDirection(myGpio, GPIO_Number_32, GPIO_Direction_Input);

GPIO_setQualification(myGpio, GPIO_Number_32, GPIO_Qual_Sample_3);
GPIO_setQualificationPeriod(myGpio, GPIO_Number_32, 0x2F);

    GPIO_setExtInt(myGpio, GPIO_Number_32, CPU_ExtIntNumber_3);

    PIE_setExtIntPolarity(myPie, CPU_ExtIntNumber_3, PIE_ExtIntPolarity_RisingAndFallingEdge);