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AN3271 数据表(PDF) 4 Page - STMicroelectronics

部件名 AN3271
功能描述  This application note provides
PDF  29 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

AN3271 数据表(HTML) 4 Page - STMicroelectronics

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List of figures
AN3271
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Doc ID 17933 Rev 2
List of figures
Figure 1.
Simplified hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2.
Simplified timing sequence for option “enable deasserted after long push” . . . . . . . . . . . . . 5
Figure 3.
Simplified timing sequence for option “reset asserted after long push” . . . . . . . . . . . . . . . . 6
Figure 4.
Typical application hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5.
Simplified relationship among VCCLO, INT and PBOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 6.
Recommended layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7.
Push-button noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 8.
Typical connection of PB and SR buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 9.
Single button control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 10.
Alternative single button control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 11.
Multiple button control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 12.
Adding external logic to implement more inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 13.
Using an LED for low battery voltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 14.
Automatic confirmation of power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 15.
Automatic power-up confirmation + shutdown after PB button press or undervoltage . . . . 17
Figure 16.
Waveform for shutdown after PB button press . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 17.
Waveform for shutdown after undervoltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 18.
Automatic power-up confirmation + shutdown after PB button press only . . . . . . . . . . . . . 20
Figure 19.
VCC transient protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 20.
High voltage connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 21.
STM660x demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 22.
Block diagram of STM660x demonstration board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 23.
STM660x interposer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 24.
STM660x demonstration board for evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27



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