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ST STM32H7 3 Series User Manual
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Power supplies
AN4938
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DocID029918 Rev 1
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Table of Contents
Table of Contents
2
Power Supplies
7
Introduction
7
Independent Analog Supply and Reference Voltage
7
USB Transceiver Independent Power Supply
7
Figure 1. VDD33USB Connected to VDD Power Supply
8
Figure 2. VDD33USB Connected to External Power Supply
9
Figure 3. VDD50USB Power Supply
9
Battery Backup Domain
10
LDO Voltage Regulator
10
Power Supply Scheme
11
Figure 4. Power Supply Overview
12
Reset and Power Supply Supervisor
13
Power-On Reset (Por)/Power-Down Reset (PDR)
13
Programmable Voltage Detector (PVD)
13
Figure 5. Power on Reset/Power down Reset Waveform
13
Analog Voltage Detector (AVD)
14
System Reset
14
Figure 6. PVD Threshold
14
Internal Reset on
15
Internal Reset off
15
Figure 7. Reset Circuit
15
Figure 8. Power Supply Supervisor Interconnection with Internal Reset off
16
Bypass Mode
17
Figure 9. NRST Circuitry Timing Example
17
Alternate Function Mapping to Pins
18
Figure 10. Stm32Cubemx Example Screen-Shot
18
Clocks
19
HSE Oscillator Clock
19
Figure 11. HSE External Clock
19
Figure 12. HSE Crystal/Ceramic Resonators
19
External User Clock (HSE Bypass)
20
External Crystal/Ceramic Resonator (HSE Crystal)
20
LSE Oscillator Clock
20
External Clock (LSE Bypass)
21
External Crystal/Ceramic Resonator (LSE Crystal)
21
Figure 13. LSE External Clock
21
Figure 14. LSE Crystal/Ceramic Resonators
21
Clock Security System (CSS)
22
Boot Configuration
23
Boot Mode Selection
23
Table 1. Boot Modes
23
Boot Pin Connection
24
System Bootloader Mode
24
Table 2. Stm32H743/753Xx Bootloader Communication Peripherals
24
Figure 15. Boot Mode Selection Implementation Example
24
Debug Management
26
Introduction
26
SWJ Debug Port (Serial Wire and JTAG)
26
TPIU Trace Port
26
Figure 16. Host to Board Connection
26
External Debug Trigger
27
Pinout and Debug Port Pins
27
SWJ Debug Port Pins
27
Table 3. TPIU Trace Pins
27
Table 4. External Debug Trigger Pins
27
Flexible SWJ-DP Pin Assignment
28
Table 5. SWJ Debug Port Pins
28
Table 6. Flexible SWJ-DP Assignment
28
Internal Pull-Up and Pull-Down on JTAG Pins
29
SWJ Debug Port Connection with Standard JTAG Connector
29
Figure 17. JTAG Connector Implementation
29
Recommendations
30
Printed Circuit Board
30
Component Position
30
Ground and Power Supply (VSS,VDD)
30
Decoupling
30
Other Signals
31
Unused I/Os and Features
31
Figure 18. Typical Layout for VDD/VSS Pair
31
Reference Design
32
Description
32
Clocks
32
Reset
32
Boot Mode
32
SWJ Interface
32
Power Supply
32
Component References
32
Table 7. Mandatory Components
32
Table 8. Optional Components
33
Figure 19. STM32H753XI Reference Schematic
34
Table 9. Reference Connection for All Packages
35
Recommended PCB Routing Guidelines for Stm32H743/753Xx Devices
39
PCB Stack-Up
39
Figure 20. Four Layer PCB Stack-Up Example
39
Crystal Oscillator
40
Power Supply Decoupling
40
Figure 21. Six Layer PCB Stack-Up Example
40
Figure 22. Decoupling Capacitor Placement Depending on Package Type
41
Figure 23. Example of Decoupling Capacitor Placed Underneath the Stm32H743/753Xx
41
High Speed Signal Layout
42
SDMMC Bus Interface
42
Flexible Memory Controller (FMC) Interface
42
Quadrature Serial Parallel Interface (QUADSPI)
43
Embedded Trace Macrocell (ETM)
45
Table 10. Document Revision History
47
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ST STM32H7 3 Series Specifications
General
Brand
ST
Model
STM32H7 3 Series
Category
Microcontrollers
Language
English
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