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TMS470MF03107: PLL Control 1 Register (PLLCTL1) 寄存器设置疑问

Part Number: TMS470MF03107

设置代码:

systemREG->PLLCTL1 = 0x00000000U
     | 0x20000000U
     | (1U - 1U << 24U)
     | 0x00000000U
     | (4U - 1U << 16U)
     | (100U - 1U << 8U);

不是很理解(1U - 1U << 24U) 和(4U - 1U << 16U) 和(100U - 1U << 8U),最终给寄存器设置的值是多少?