ST STM32N6570-DK User Manual page 14

7.4.1 Power source selection
The STM32N6570-DK product is designed to be powered by a 5 V DC power supply. It is possible to configure
the Discovery board with JP2 headers to use any of the four sources described in
supply.
Reference
JP2
1. The default setting is in bold
7.4.2 STLK (for compatibility with legacy USB Host port)
Figure 8 shows the selection of 5 V from 5V_STLK on JP2 [1-2], with a power source connected to USB ST-LINK
(CN6). It is the default setting.
The STLK ST-LINK USB Type-C
PC only provides 100 mA to the ST-LINK circuit until the end of USB enumeration. At the end of the USB
enumeration, the STM32N6570-DK Discovery kit asks for a 2 A current to the host PC.
If the USB enumeration succeeds, a power switch powers the board with up to 3.2 A current. This power switch
also features a 550 mA, 1.66 or 3.2 A current limitation to protect the PC in case of overcurrent on the board.
7.4.3 User USB1
Figure 9 shows the selection of 5 V DC power from USER USB1 on JP2, with a power source connected to the
®
USB Type-C
STM32N6570-DK Discovery kit from overvoltage on VBUS. The USB Type-C
the 5 V +/- 5% range.
The following constraints apply to USB Type-C
• USB 2.0 or USB 3.x legacy hosts might be used if they can provide 500 mA without data communication. In
practice, today nearly all these ports deliver 500 mA without data communication.
It is preferable to use USB ports showing charging port marking in that case ( ), as they enable higher
currents.
• Any other USB Type-C
powered through USB1(CN18), LED (LD9) lights up.
UM3300 - Rev 1
Table 5.
(1)
Jumper
5V_STLK
USB_SNK
5V_VIN
®
connector (CN6) can power the STM32N6570-DK Discovery kit, but the host
Figure 8.
connector (CN18). The LED (LD9) lights up. A power switch with a protective circuit protects the
®
source type can supply and start up the STM32N6570-DK board, up to 3 A. When
5 V power configurations
Function
5 V is supplied from
USB STLK (CN6)
5 V is supplied from
USB1 (CN18)
5 V is supplied from
®
ARDUINO connector (CN8)
STLK (JP2) from USB STLK (CN6)
®
host types to be used:
Hardware layout and configuration
Table 5 for the 5 V DC power
Comment
• 5 V (+/- 5%)
• 3.5 A embedded overcurrent
protection
• Up to 3 A capable
• 5 V (+/- 5% at current < 500 mA)
• Up to 3 A (check USB Type-C
constraints in that case)
• 5 V (+/- 5%)
• Up to 0.8 A capable
®
VBUS nominal voltage must be in
UM3300
®
VBUS
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