User manual

DocID025833 Rev 3 17/49
UM1724 Hardware layout and configuration
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turned OFF. In such case it is mandatory to use an external power supply as explained in
the next chapter.
When the board is power supplied by USB (U5V) a jumper must be connected between pin
1 and pin 2 of JP5 as shown in Table 7.
JP1 is configured according to the maximum current consumption of the board when
powered by USB (U5V). JP1 jumper can be set only in case the board is powered by USB
and maximum current consumption on U5V doesn’t exceed 100mA (including an eventual
extension board or Arduino Shield). In such condition USB enumeration will always succeed
since no more than 100mA is requested to the PC. Possible configurations of JP1 are
summarized in Table 5.
Warning: If the maximum current consumption of the NUCLEO and its
extension boards exceeds 300 mA, it is mandatory to power
the NUCLEO using an external power supply connected to
E5V or VIN.
5.3.2 External power supply inputs: VIN and EV5
The external power sources VIN and EV5 are summarized in the Table 6. When the board is
power supplied by VIN or E5V, the jumpers configuration must be the following:
Jumper on JP5 pin 2 and pin 3
Jumper removed on JP1
Table 5. JP1 configuration table
Jumper state Power supply Allowed current
JP1 jumper OFF
USB power through CN1
300 mA max
JP1 jumper ON 100 mA max
Table 6. External power sources
Input power
name
Connectors
pins
Voltage range Max current Limitation
VIN
CN6 pin 8
CN7 pin 24
7 V to 12 V 800 mA
From 7 V to 12 V only and input current capability
is linked to input voltage:
800 mA input current when Vin=7 V
450 mA input current when 7 V<Vin (< or =) 9 V
250 mA input current when 9 V<Vin (< or =) 12 V
E5V CN7 pin 6
4.75 V to
5.25 V
500 mA