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AN4635 Datasheet(PDF) 27 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) 27 Page - STMicroelectronics

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AN4635
Power consumption comparison
33
Figure 11. HSI vs. MSI at 4 MHz
Note that the timing with MSI is slightly off in the transmission phase. This is a common
problem when MSI is used to clock the LPUART peripheral.
Table 13. Configurations - HSI vs. MSI
Curve in Figure 11
Black
Red
Idle mode between
transmissions
Stop
Sleep
JTAG interface
OFF
Current average
over phases 2, 3 and 4
17.39 µA
15.53 µA
Clock
4 MHz HSI
4 MHz MSI
Voltage regulator
Range 3
AHB/APB ratio
1/1
ULP/FWU
+/+



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