最近在用 STM32L432 开发低功耗应用；开发板是STM32L432KC-NUCLEO，
1、断开LDO输出 短路帽；
2、使用Pin 脚AVDD供电，并测量电流；
3、使用如下代码进入低功耗；
RCC->AHB1RSTR = 0xffffffff;
////RCC->AHB2RSTR = 0xffffffff;
RCC->AHB3RSTR = 0xffffffff;
RCC->APB1RSTR1 = 0xffffffff;
RCC->APB1RSTR2 = 0xffffffff;
RCC->APB2RSTR = 0xffffffff;
RCC->CR = 0;
RCC->CFGR = 0;
RCC->PLLCFGR = 0;
RCC->PLLSAI1CFGR = 0;
GPIOA->MODER = 0xffffffff;
GPIOB->MODER = 0xffffffff;
GPIOC->MODER = 0xffffffff;
GPIOH->MODER = 0xffffffff;
GPIOA->PUPDR = 0x00000000;
GPIOB->PUPDR = 0x00000000;
GPIOC->PUPDR = 0x00000000;
GPIOH->PUPDR = 0x00000000;
SysTick->CTRL &= ~SysTick_CTRL_TICKINT_Msk;
PWR->CR1 &= 0xfffffff8;
PWR->CR1 |= 0x00000004;
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
__WFI();
4、无论怎么优化，都是110uA 左右功耗，求大侠帮忙；
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