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AN4635 Scheda tecnica(PDF) 25 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) 25 Page - STMicroelectronics

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AN4635
Power consumption comparison
33
6.9
Higher communication speed
While no advanced power saving features of the LPUART can be used on higher
communication speeds (as compared with regular USART peripheral), still the LPUART
simpler circuitry will result in lower power consumption (red line) compared to a full featured
USART (black line), see Figure 10.
Figure 10. Operating at 57600 baud
Baud rate
9600
SW used
Interrupt operation (Com IT) with defines RXSTOP and TXSLEEP
Table 11. Configurations - ULP bit effect (continued)
Curve in Figure 9
Black
Green
Table 12. Configurations - Higher communication speed
Curve in Figure 10
Black
Red
Idle mode between
transmissions
Stop
JTAG interface
ON
Current average
over phases 2, 3 and 4
20.45 µA
19.05 µA
Clock
4 MHz MSI



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