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STM32CUBEL4 датащи(PDF) 25 Page - STMicroelectronics

номер детали STM32CUBEL4
подробное описание детали  STM32CubeL4 demonstration firmware for 32L476GDISCOVERY discovery kit
PDF  37 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
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STM32CUBEL4 датащи(HTML) 25 Page - STMicroelectronics

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UM1919
Demonstration firmware settings
36
5
Demonstration firmware settings
5.1
Clock control
The demonstration firmware takes benefit of the STM32L476VGT6 clock tree by selecting
dynamically the clock configuration required by the running application/module when
running in low-power mode.
The following clock configurations are used in the demonstration firmware:
The following oscillators and PLL are used in the demonstration firmware:
Table 5. Clock configurations
Clock configuration
Application/module
USB-powered
Application/module
battery
SYSCLK: 2MHz MSI
(LPRUN voltage range 2)
-
Demonstration startup
IDD application
SYSCLK: 16MHz PLL from MSI 16MHz
(RUN voltage range 2)
-
Sound Meter
Compass
SYSCLK: 80MHz (PLL) from MSI 8MHz
(RUN voltage range 1)
Demonstration startup
All applications
-
Table 6. Oscillators and PLL description
Oscillators
Application/module
USB-powered
Application/module
battery
MSI from 2MHz to 16MHz
Demonstration startup
Demonstration startup
IDD application
Sound meter
Compass
LSE
LCD glass display
LCD glass display
LSI
Internal Watchdog
for automatic FW reset
(error management)
-
PLL main
Demonstration startup
All applications
Sound meter
Compass
PLLSAI1
PLLSAI1_VCO= 8 MHz * PLLSAI1N = 8 * 43 =
VCO_344M
SAI_CK_x = PLLSAI1_VCO/PLLSAI1P = 344/7 =
49.142 MHz
Player
Record
Sound meter
Guitar tuner
Sound meter



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