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ST7LITEUS2 Folha de dados(PDF) 48 Page - STMicroelectronics

Nome de Peças ST7LITEUS2
Descrição Electrónicos  Interrupt management
PDF  136 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LITEUS2 Folha de dados(HTML) 48 Page - STMicroelectronics

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Power saving modes
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8
Power saving modes
8.1
Introduction
To give a large measure of flexibility to the application in terms of power consumption, four
main power saving modes are implemented in the ST7 (see Figure 18):
●
Slow
●
Wait (and Slow-wait)
●
Active-halt
●
Auto-wakeup from Halt (AWUFH)
●
Halt
After a reset the normal operating mode is selected by default (Run mode). This mode
drives the device (CPU and embedded peripherals) by means of a master clock which is
based on the main oscillator frequency (fOSC).
From Run mode, the different power saving modes may be selected by setting the relevant
register bits or by calling the specific ST7 software instruction whose action depends on the
oscillator status.
Figure 18.
Power saving mode transitions
POWER CONSUMPTION
Wait
Slow
Run
Active halt
High
Low
Slow wait
Halt
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