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AN4218 Datasheet(PDF) 13 Page - STMicroelectronics

Part # AN4218
Description  Hardware design guideline
PDF  26 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4218 Datasheet(HTML) 13 Page - STMicroelectronics

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DocID024014 Rev 2
13/26
AN4218
Good practices of system power supply
Figure 11. Measurement over the entire pulse
1.
Line 1 (RST): NRESET output
Line 2 (V1): microcontroller power supply VDD
Line 3 (VBAT): system power supply (VBAT)
Line 4 (OUT_HS): high-side driver output
Line D4 (CSN): SPI-logic signal chip-select-not
Line D5 (OUT_LS): low-side driver output
Line D7 (FSO): fail-safe state (internal signal)
Figure 12. Zoom into the low voltage drop region
1.
Line 1 (RST): NRESET output
Line 2 (V1): microcontroller power supply VDD
Line 3 (VBAT): system power supply (VBAT)
Line 4 (OUT_HS): high-side driver output
Line D4 (CSN): SPI-logic signal chip-select-not
Line D5 (OUT_LS): low-side driver output
Line D7 (FSO): fail-safe state (internal signal)



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