NVIC是K60的内核外设，类似于Systick。
一些总要的寄存器如下：
__IO uint32_t ISER[8]; /* Interrupt Set Enable Register */
uint32_t RESERVED0[24];
__IO uint32_t ICER[8]; /* Interrupt Clear Enable Register */
uint32_t RSERVED1[24];
__IO uint32_t ISPR[8]; /* Interrupt Set Pending Register */
uint32_t RESERVED2[24];
__IO uint32_t ICPR[8]; /* Interrupt Clear Pending Register */
uint32_t RESERVED3[24];
__IO uint32_t IABR[8]; /* Interrupt Active bit Register */
uint32_t RESERVED4[56];
__IO uint8_t IP[240]; /* Interrupt Priority Register (8Bit wide) */
uint32_t RESERVED5[644];
__O uint32_t STIR; /* Software Trigger Interrupt Register */
各个寄存器的描述
中断向量号的查询在MK60D10.h中完成，NVIC的中断号是负数。
ISER 设置使能中断。
ICER 清除中断
