Reference design AN4938
32/48 DocID029918 Rev 1
7 Reference design
7.1 Description
The reference design shown in Figure 19, is based on the STM32H753XI, a highly
integrated microcontroller that combines the ARM
®
Cortex
®
-M7 32-bit RISC core running at
up to 400
MHz with up to 2 Mbyte dual-bank Flash memory and 1 Mbytes of RAM (including
192
Kbytes of TCM RAM, 864 Kbytes of user RAM and 4 Kbytes of backup SRAM).
7.1.1 Clocks
Two clock sources are used for the microcontroller:
• LSE: X2– 32.768 kHz crystal for the embedded RTC.
• HSE: X1– 25 MHz crystal.
Refer to Section 3: Clocks on page 19.
7.1.2 Reset
The reset signal of STM32H753XI device is low active and the reset sources include:
• Reset button B1
• Debugging Tools from JTAG/SWD connector CN15 and ETM trace connector CN12
Refer to Section 1.3: Reset and power supply supervisor on page 13.
7.1.3 Boot mode
Refer to Section 4: Boot configuration on page 23.
7.1.4 SWJ interface
Refer to Section 5: Debug management on page 26.
7.1.5 Power supply
Refer to Section 1: Power supplies on page 7.
7.2 Component references
Table 7. Mandatory components
Id Component name Reference Quantity Comments
1 Microcontroller STM32H753XI 1 TFBGA240 package
2 Capacitor 100 nF 20
Ceramic capacitors (decoupling
capacitors)
3 Capacitor 4.7 µF 1
Ceramic capacitor (decoupling
capacitor)
Capacitor 2.2 µF 2
Ceramic capacitor (regulator
capacitor)
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