7.4.6 Consumption measurement
Using CN2 pins to measure the current of the MCU powers.
• The pin 1/pin 2 pair can measure the input current for an external SMPS (R23 OFF)
• The pin 3/pin 4 pair can measure the current of VDDCORE when in external SMPS mode (R31 OFF)
• The pin 5/pin 6 pair can measure the input current for the internal SMPS (R19 OFF)
• The pin 9/pin 10 pair can measure the current of VDDCORE when in internal SMPS mode (R167 OFF)
• The pin 11/pin 12 pair can measure the current of VDDIO (R79 OFF)
• The pin 13/pin 14 pair can measure the current of VDDA1V8 (R187 OFF)
The user can measure the current of VDD33USB through R159.
The user can measure the current of VDDA18AON through R163.
7.5 Clock sources
Four clock sources are available on the STM32N6570-DK board, as described below:
• X1 24 MHz crystal for the STLINK-V3EC
• X2 48 MHz crystal for the STM32N657X0H3Q HSE system clock
• X3 32.768 kHz crystal for the STM32N657X0H3Q embedded RTC
• X4 25 MHz crystal for Ethernet
7.6 Reset sources
The general reset of the STM32N6570-DK board is active LOW. The reset sources include:
• Reset button (B1)
• Embedded STLINK-V3EC
• ARDUINO
®
Uno shield board through ARDUINO
®
connector (CN8 pin 3)
• MIPI20 (CN10)
• TAG connector (CN1)
The general reset is connected to the following peripheral reset functions:
• Octo‑SPI flash memory
• microSD
™
power
• Ethernet
7.7
Boot options
BOOT0 and BOOT1 pins determine the boot mode as shown in Table 7. For more details, refer to the RM0486
reference manual available at www.st.com.
Table 7. Boot modes
BOOT0
BOOT1 Boot source #1
- 1 Development boot
0 0 Flash boot
1 0 Serial boot
On the board, BOOT0 and BOOT1 might be configured manually by pushing the mechanical parts: SW1(BOOT1)
and SW2(BOOT0).
UM3300
Hardware layout and configuration
UM3300 - Rev 1
page 16/49
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