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AN4635 Scheda tecnica(PDF) 26 Page - STMicroelectronics

Il numero della parte AN4635
Spiegazioni elettronici  Minimization of power consumption using LPUART in microcontrollers of the STM32L0 series
PDF  34 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4635 Scheda tecnica(HTML) 26 Page - STMicroelectronics

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Power consumption comparison
AN4635
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DocID027290 Rev 1
Note:
The timing is slightly different for the 2 cases. This is a common problem when MSI is used
to clock the LPUART peripheral. MSI clock is generally less precise than LSE or even HSI.
6.10
Wakeup from Stop mode on HSI
Another option to use with higher communication speed is to exploit the feature of wakeup
from Stop mode with peripheral being clocked from the HSI clock (see Figure 11).
The HSI oscillator draws approximately as much current in combination with the Stop mode
as the MSI at 2 MHz requires in Sleep mode. It is however more precise and with provides
the core with more processing power in run mode.
Voltage regulator
Range 1
AHB/APB ratio
1/1
ULP/FWU
+/+
Baud rate
57600
SW used
Interrupt operation (Com IT)
modified with USART on SYSCLK
Interrupt operation (Com IT)
modified with LPUART on SYSCLK
Table 12. Configurations - Higher communication speed (continued)
Curve in Figure 10
Black
Red



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