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AN4635 датащи(PDF) 15 Page - STMicroelectronics

номер детали AN4635
подробное описание детали  Minimization of power consumption using LPUART in microcontrollers of the STM32L0 series
PDF  34 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4635 датащи(HTML) 15 Page - STMicroelectronics

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AN4635
Power consumption comparison
33
6.1
Stop vs. Sleep mode
The first comparison deals with the difference between the Sleep and Stop modes.
While waiting for the incoming communication, the device wants to minimize the power
consumption. The black line in Figure 2 represents debug configuration with device waiting
in Sleep mode. Using the LSE clock and LPUART peripheral the Stop mode can be
employed up to speed of 9600 baud, this is the green line. Finally, with purple line we can
see the absolute minimum current absorbed in Stop mode where the debug lines are
configured as analog input and the device is using the ULP + FWU combination.
Figure 2. Stop vs. Sleep mode
Table 4. Configurations - Stop vs. Sleep mode
Curve in Figure 2
Black
Green
Purple
Idle mode between
transmissions
Sleep
Stop
JTAG interface
ON
OFF
Current average
over phases 2, 3 and 4
18.35 µA
17.66 µA
16.99 µA
Clock
500 kHz MSI
Voltage regulator
Range 3
ULP/FWU
+/+
AHB/APB ratio
1/1
Baud rate
9600
SW used
Interrupt operation (Com IT) with defines RXSLEEP and TXSLEEP



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