ST X-NUCLEO-SNK1M1, Руководство пользователя

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In addition to the main functions related to the USB Type-C and Power Delivery specification:
•
an ADC channel can be used to monitor the V
BUS
voltage (ADC_VBUS)
• a supply option path allows supplying the TCPP01-M12 either via the 3.3 V provided by the STM32 Nucleo
development board or via a GPIO on the ST morpho connector (CN7-1). You can select the path through
R23 and R24 resistances. This option, combined with the
TCPP01-M12 low consumption, is useful for
battery-powered devices as the TCPP01-M12 can be powered only when an attachment is detected (low-
power mode)
• the TCPP01-M12 fault report pin (open drain) is connected to the ST morpho connector pin (CN10 – 18) to
be monitored by the STM32 microcontroller (FLT – FLT_IN path)
1.2.6 Indication LEDs
Two LEDs mounted on the X-NUCLEO-SNK1M1 top side indicate the supply status of the expansion board and
the stacked STM32 Nucleo development board:
• the red LED (LD1) turns ON when a source application board is plugged to the X-NUCLEO-SNK1M1 CN1
connector and the USB Type-C V
BUS
voltage is present;
• the green LED (LD2) indicates that the 3.3 V is present and is supplying the STM32 Nucleo microcontroller
development board.
Figure 9. Indication LEDs
3.3V
GND GND
R5
LD1
A
C
150060RS75000
3.9k
LD2
A
C
VBUS
Red LED
Green LED
3.3V
VBus
R4
150060GS75000
1k
1.2.7 Dead battery mode configuration jumpers and internal LDO
Thanks to the dead battery feature, described by the USB Power Delivery specification and implemented by the
X-NUCLEO-SNK1M1 , it is possible to directly power the system through the V
BUS
provided by a Source, as an
alternative mode to the standard supply through the STM32 Nucleo ST-LINK .
Note: Before configuring the X-NUCLEO-SNK1M1 to operate in dead battery mode, check whether the supply
selection jumpers on the STM32 Nucleo board have been removed:
• on the NUCLEO-G071RB , remove the jumper from JP2 header
• on the NUCLEO-G474RE , remove the jumper from JP5 header 5V_SEL
• on the NUCLEO-L412RB-P , remove the jumper from JP5 header
UM2773
Hardware architecture
UM2773 - Rev 1
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