ST B-L4S5I-IOT01A - Figure 8. JP4: 5 V_ARD Selection from CN6 (VIN); Figure 9. JP4: 5 V_USB_FS

Figure 8. JP4: 5V_ARD selection from CN6 (VIN)
1
2
3
5
7
4
6
8
109
5V_ST_LINK
5V_ARD
5V_USB_FS
5V_VBAT
5V_USB_CHARGER
JP4
5V_USB_FS
(Refer to Figure 9)
This is the DC power with 500 mA limitation from CN9, the USB OTG FS Micro-AB connector. In this case, the
JP4 jumper must be fitted between pin 5 and pin 6 to select the 5V_USB_FS power source on the JP4 silkscreen.
Figure 9. JP4: 5V_USB_FS
1
2
3
5
7
4
6
8
109
5V_ST_LINK
5V_ARD
5V_USB_FS
5V_VBAT
5V_USB_CHARGER
JP4
5V_VBAT
(Refer to Figure 10)
This is the DC power coming from an external source. In this case, the JP4 jumper must be fitted between pin 7
and pin 8 to select the 5V_VBAT power source on JP4 silkscreen.
UM2708
Power supply
UM2708 - Rev 1
page 13/43