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6.2 KEY FEATURES OF THE STM32F411RET6 MICROCONTROLLER 71
to IWDG to RTC and LCD to PWR to APB1 peripherals to TIMx x=2..7 to USARTx x=2..5 to LPUART1
to AHB bus, core, memory and DMA FCLK Cortex free running clock to Cortex system timer PCLK1 x1 or x2
HCLK / 8 APB1 PRESC / 1,2,4,8,16 LSE HSI SYSCLK
AHB PRESC / 1,2,..512
SYSCLK
Clock source control
/32 HSI
MSI
HSE
(continued).
LSE LSI HSE SYSCLK HSI
circuit
LSI RC 32 kHz LSE OSC 32.768 kHz / 1→16 HSE OSC 4–48 MHz Clock detector HSI RC 16 MHz clock
OSC32_OUT OSC32_IN OSC_OUT STM32L433RCT6P
LSCO MCO OSC_IN 6.5
FIG.
