/* select HXTAL/2 as clock source */RCU_CFG0 &= ~(RCU_CFG0_PLLSEL | RCU_CFG0_PREDV0);RCU_CFG0 |= (RCU_PLLSRC_HXTAL_IRC48M | RCU_CFG0_PREDV0);/* CK_PLL = (CK_HXTAL/2) * 30 = 120 MHz */RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4 | RCU_CFG0_PLLMF...
RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4 | RCU_CFG0_PLLMF_5); RCU_CFG0 |= RCU_PLL_MUL30; 可以看出,8MHz的HXTAL经过预分频器PREDV0分频成4MHz,再通过锁相环PLL倍频30倍到了120MHz。 那么,当您选择其他规格的外部晶振,比如12MHz,则可以先通过预分频器PREDV0分频成6MHz,再通过锁...
/* CK_PLL = (CK_HXTAL/2) * 30 = 120 MHz */ RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_...
/* select HXTAL/2 as clock source */ RCU_CFG0 &= ~(RCU_CFG0_PLLSEL | RCU_CFG0_PREDV0); RCU_CFG0 |= (RCU_PLLSRC_HXTAL_IRC48M | RCU_CFG0_PREDV0); /* CK_PLL = (CK_HXTAL/2) * 30 = 120 MHz */ RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4 | RCU_CFG0...
RCU_CFG0 |= (RCU_PLLSRC_HXTAL_IRC48M | RCU_CFG0_PREDV0); /* CK_PLL = (CK_HXTAL/2) * 30 = 120 MHz */ /* 若希望调整系统时钟,可以调整RCU_PLL_MUL30倍频因子即可 */ RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4 | RCU_CFG0_PLLMF_5); ...
RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4 | RCU_CFG0_PLLMF_5); RCU_CFG0 |= RCU_PLL_MUL30; 可以看出,8MHz的HXTAL经过预分频器PREDV0分频成4MHz,再通过锁相环PLL倍频30倍到了120MHz。 那么,当您选择其他规格的外部晶振,比如12MHz,则可以先通过预分频器PREDV0分频成6MHz,再通过锁...
/* CK_PLL = (CK_HXTAL/2) * 30 = 120 MHz */ /* 若希望调整系统时钟,可以调整RCU_PLL_MUL30倍频因子即可 */ RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4 | RCU_CFG0_PLLMF_5); RCU_CFG0 |= RCU_PLL_MUL30; /* 使能 PLL */ ...
RCU_CFG0 |= (RCU_PLLSRC_HXTAL_IRC48M | RCU_CFG0_PREDV0); /* CK_PLL = (CK_HXTAL/2) * 30 = 120 MHz *//* 若希望调整系统时钟,可以调整RCU_PLL_MUL30倍频因子即可 */ RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4 | RCU_CFG0_PLLMF_5); RCU_CFG0 |= RCU_PLL_MUL...
RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4 | RCU_CFG0_PLLMF_5); RCU_CFG0 |= RCU_PLL_MUL30; 可以看出,8MHz的HXTAL经过预分频器PREDV0分频成4MHz,再通过锁相环PLL倍频30倍到了120MHz。 那么,当您选择其他规格的外部晶振,比如12MHz,则可以先通过预分频器PREDV0分频成6MHz,再通过锁...
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