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AN4635 Datasheet(PDF) 5 Page - STMicroelectronics

Part # AN4635
Description  Minimization of power consumption using LPUART in microcontrollers of the STM32L0 series
PDF  34 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4635 Datasheet(HTML) 5 Page - STMicroelectronics

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DocID027290 Rev 1
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AN4635
List of figures
5
List of figures
Figure 1.
Test loop description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 2.
Stop vs. Sleep mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 3.
Sleep mode vs. LPRUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 4.
Interrupt operation overhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 5.
Using the Stop during data reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 6.
Core clock speed comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 7.
Lowering oscillator speed compared to AHB divider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 8.
Three different settings of peripheral clock divider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 9.
ULP bit effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 10.
Operating at 57600 baud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 11.
HSI vs. MSI at 4 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 12.
Comparison between voltage regulator settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 13.
GPIO internal pull-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29



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