Name: ST STM32F4 Series
Brand: ST
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DocID026304 Rev 3 25/44

AN4488 Package

3.3 Alternate Function mapping to pins

In order to easily explore Peripheral Alternate Functions mapping to pins, it is recommended

to use the STM32CubeMX tool available on www.st.com.

Figure 17. STM32CubeMX example screen-shot

Table of Contents2
Reference Documents6
Table 2. Referenced Documents6
Power Supplies7
Introduction7
Independent A/D Converter Supply and Reference Voltage7
Battery Backup7
Voltage Regulator8
Power Supply Schemes8
Figure 1. Power Supply Scheme9
Reset & Power Supply Supervisor10
Power on Reset (POR) / Power down Reset (PDR)10
Programmable Voltage Detector (PVD)10
Figure 2. Power-On Reset/Power-Down Reset Waveform10
System Reset11
Figure 3. PVD Thresholds11
Figure 4. Reset Circuit11
PDR_ON Circuitry Example12
Figure 5. PDR_ON Simple Circuitry Example (Not Needed for Stm32F411Xx and Stm32F446Xx)12
Figure 6. PDR_ON Timings Example13
NRST Circuitry Example (for Stm32F411Xx and Stm32F446Xx Only)14
Figure 7. NRST Circuitry Example14
Figure 8. NRST Circuitry Timings Example (Not to Scale, Only for Stm32F411Xx and Stm32F446Xx)15
Regulator off Mode16
Figure 9. BYPASS_REG Supervisor Reset Connection16
Regulator ON/OFF and Internal Reset ON/OFF Availability17
Table 3. Regulator ON/OFF and Internal Power Supply Supervisor Availability17
Package18
Package Selection18
Table 4. Package Summary (Excluding WCSP)18
Table 5. WCSP Package Summary19
Pinout Compatibility20
Table 6. Pinout Summary20
Compatibility Within Stm32F4X Family21
Figure 10. STM32F4 Family Compatible Board Design for LQFP64 Package21
Figure 11. STM32F4 Family Compatible Board Design for LQFP100 Package22
Figure 12. Compatible Board Design Stm32F4Xx / Stm32F446Xx22
For LQFP144 Package22
Compatibility with Stm32F1X and Stm32F2X Families23
Figure 13. Compatible Board Design Stm32F10Xx/Stm32F4Xx23
For LQFP64 Package23
Figure 14. Compatible Board Design Stm32F10Xx/Stm32F2Xx/Stm32F4Xx23
For LQFP100 Package23
For LQFP144 Package24
Figure 16. Compatible Board Design Stm32F2Xx and Stm32F4Xx24
For LQFP176 and UFBGA176 Packages24
Alternate Function Mapping to Pins25
Figure 17. Stm32Cubemx Example Screen-Shot25
Clocks26
HSE OSC Clock26
Figure 18. HSE External Clock26
Figure 19. HSE Crystal/Ceramic Resonators26
External Source (HSE Bypass)27
External Crystal/Ceramic Resonator (HSE Crystal)27
LSE OSC Clock28
External Source (LSE Bypass)28
External Crystal/Ceramic Resonator (LSE Crystal)28
Figure 20. LSE External Clock28
Figure 21. LSE Crystal/Ceramic Resonators28
Clock Security System (CSS)29
Boot Configuration30
Boot Mode Selection30
Boot Pin Connection30
Table 7. Boot Modes30
Figure 22. Boot Mode Selection Implementation Example30
Embedded Boot Loader Mode31
Debug Management32
Introduction32
SWJ Debug Port (Serial Wire and JTAG)32
Pinout and Debug Port Pins32
SWJ Debug Port Pins32
Figure 23. Host-To-Board Connection32
Flexible SWJ-DP Pin Assignment33
Internal Pull-Up and Pull-Down Resistors on JTAG Pins33
Table 8. Debug Port Pin Assignment33
Table 9. SWJ I/O Pin Availability33
SWJ Debug Port Connection with Standard JTAG Connector34
Figure 24. JTAG Connector Implementation34
Recommendations35
Printed Circuit Board35
Component Position35
Ground and Power Supply (VSS , VDD )35
Decoupling35
Other Signals36
Unused I/Os and Features36
Figure 25. Typical Layout for V36
DD /Vss36
DD SS Pair36
Reference Design37
Description37
Clock37
Reset37
Boot Mode37
SWJ Interface37
Power Supply37
Component References38
Table 10. Mandatory Components38
Table 11. Optional Components38
Figure 26. STM32F407IG(H6) Microcontroller Reference Schematic39
Table 12. Reference Connection for All Packages40
Revision History43
Table 1. Applicable Products43
Table 13. Document Revision History43

Brand	ST
Model	STM32F4 Series
Category	Computer Hardware
Language	English

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