Datasheet

Functional overview STM32L476xx
38/270 DS10198 Rev 8
Figure 4. Clock tree
PLLCLK
MS32440V3
SYSCLK
MCO
LSCO
SAI2_EXTCLK
48 MHz clock to USB, RNG, SDMMC
to ADC
to IWDG
to RTC and LCD
to PWR
HCLK
to AHB bus, core, memory and DMA
FCLK Cortex free running clock
to Cortex system timer
to APB1 peripherals
to APB2 peripherals
PCLK1
PCLK2
to SAI1
to SAI2
LSE
HSI16
SYSCLK
to USARTx
x=2..5
to LPUART1
to I2Cx
x=1,2,3
to LPTIMx
x=1,2
SAI1_EXTCLK
to SWPMI
to TIMx
x=2..7
OSC32_OUT
OSC32_IN
MSI
HSI16
HSE
HSI16
LSI
LSE
HSE
SYSCLK
HSE
MSI
HSI16
MSI
SYSCLK
LSE OSC
32.768 kHz
/32
AHB
PRESC
/ 1,2,..512
/ 8
APB1
PRESC
/ 1,2,4,8,16
x1 or x2
HSI16
SYSCLK
LSI
LSE
HSI16
HSI16
APB2
PRESC
/ 1,2,4,8,16
to TIMx
x=1,8,15,16,17
x1 or x2
to
USART1
LSE
HSI16
SYSCLK
/ M
MSI RC
100 kHz – 48 MHz
HSI RC
16 MHz
HSE OSC
4-48 MHz
Clock
detector
OSC_OUT
OSC_IN
/ 1→16
LSI RC 32 kHz
Clock
source
control
PLLSAI3CLK
PLL48M1CLK
PLLCLK
PLLSAI1CLK
PLL48M2CLK
PLLADC1CLK
PLLSAI2CLK
PLLADC2CLK
MSI
PLLSAI1
VCO
F
VCO
/ P
/ R
/ Q
PLLSAI2
VCO
F
VCO
/ P
/ R
/ Q
PLL
VCO
F
VCO
/ P
/ R
/ Q
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