Name: ST STM32U5
Brand: ST
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Figure 18. STM32U535/545/575/585xxxxQ reference design (with SMPS)

DT71534V1

AN5373

Design reference for a STM32U5 device (with and without SMPS)

AN5373 - Rev 6

page 38/47

General Information2
Power Supply Management3
Power Supplies3
Independent Analog Peripherals Supply10
Independent I/O Supply Rail11
Independent USB Transceiver Supply11
Battery Backup Domain11
Voltage Regulator12
Power Supply for I/O Analog Switches13
Power Supply Schemes13
Figure 7. Power Supply Scheme for U535/545/575/585Xxxxq (with SMPS)14
Figure 9. Power Supply Scheme for Stm32U5F/5G/59/5Axxx (with SMPS)16
Power Supply Sequence between VDDA, VDDUSB, VDDIO2, and VDD18
Power Supply Isolation18
General Requirements18
Particular Conditions During the Power-Down Phase18
Reset and Power-Supply Supervisor19
Brownout Reset (BOR)19
System Reset19
Figure 12. Brownout Reset Waveform19
Backup Domain Reset20
Figure 13. Simplified Diagram of the Reset Circuit20
Packages21
Package Summary21
Conversion from UFBGA169 to TFBGA169 Boards22
Table 1. Package Summary for STM32U5 Devices22
Pinout Summary23
Clocks25
HSE Clock25
External Crystal/Ceramic Resonator (HSE Crystal)26
External Source (HSE Bypass)26
HSI16 Clock26
MSI (MSIS and MSIK) Clocks26
LSE Clock26
Boot Configuration28
Boot Mode Selection28
Embedded Bootloader and RSS29
Table 5. Boot Modes When Trustzone ® Is Enabled (TZEN = 1)29
Debug Management30
SWJ-DP (Serial-Wire and JTAG Debug Port)30
Pinout and Debug Port Pins30
SWJ-DP Pins30
Flexible SWJ-DP Pin Assignment31
Internal Pull-Up and Pull-Down Resistors on JTAG Pins31
SWJ-DP Connection with Standard JTAG Connector32
Serial-Wire Debug (SWD) Pin Assignment32
Internal Pull-Up and Pull-Down on SWD Pins32
SWD Port Connection with Standard SWD Connector33
Recommendations34
PCB (Printed Circuit Board)34
Component Position34
Ground and Power Supply34
Decoupling34
Other Signals35
Unused I/Os and Features35
Figure 17. Typical Layout for VDD/VSS Pin Pair35
Reference Design36
Description36
Design Reference for a STM32U5 Device (with and Without SMPS)37
Table 9. Components of STM32U5 Device Design Reference37
Figure 18. Stm32U535/545/575/585Xxxxq Reference Design (with SMPS)38
Figure 19. Stm32U5Xxx Reference Design (Without SMPS)39
Table 10. Components of STM32U599 Discovery Kit40
Figure 20. Stm32U59/5A/5F/5Gxxxxxq Reference Design (with SMPS)41
Revision History42
Table 11. Document Revision History42
Figure 1. Stm32U535Xxxxq and Stm32U545Xxxxq Power Supply Overview (with SMPS)42
Figure 2. Stm32U535Xx and Stm32U545Xx Power Supply Overview (Without SMPS)42
Figure 3. Stm32U575Xq and Stm32U585Xq Power Supply Overview (with SMPS)42
Figure 4. Stm32U575Xx and Stm32U585Xx Power Supply Overview (Without SMPS)42
Figure 5. Stm32U5F/5G/59/5Axxxxxq Power Supply Overview (with SMPS)42
Figure 6. Stm32U5F/5G/59/5Axxx Power Supply Overview (Without SMPS)42
Table of Contents43
List of Tables45
List of Figures46

Brand	ST
Model	STM32U5
Category	Computer Hardware
Language	English

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