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ST7FOXU0 Datasheet(PDF) 47 Page - STMicroelectronics

Part # ST7FOXU0
Description  1 additional output line
PDF  123 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7FOXU0 Datasheet(HTML) 47 Page - STMicroelectronics

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ST7FOXU0
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 17):
Slow
Wait (and Slow-Wait)
Active Halt
Auto Wake up 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 17.
Power saving mode transitions
POWER CONSUMPTION
Wait
Slow
Run
Active Halt
High
Low
Slow Wait
Halt



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