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AN4635 Scheda tecnica(PDF) 19 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) 19 Page - STMicroelectronics

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AN4635
Power consumption comparison
33
Figure 5. Using the Stop during data reception
6.5
Different oscillator clock speeds
Using the MSI clock the application computing power and power consumption can be easily
tuned to imminent needs of the system. It is of course possible to change the clock settings
on the fly, during execution.
Figure 6 shows the test execution at 2 MHz (black line), 500 kHz (purple line) and 130 kHz
(green line). The difference is large, but using the Sleep mode between both transmitted
Table 7. Configurations - Stop during data reception
Curve in Figure 5
Black
Red
Idle mode between
transmissions
Stop
JTAG interface
OFF
Current average
5.70 µA (Rx only)
6.35 µA (Rx only)
Clock
4 MHz MSI
500 kHz MSI
Voltage regulator
Range 3
AHB/APB ratio
1/1
ULP/FWU
+/+
Baud rate
9600
SW used
Interrupt operation (Com IT) with defines RXSTOP and TXSLEEP



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