Ublox EVK-NORA-W36, User Manual

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EVK-NORA-W36 - User guide
UBX-22035800 - R01 Hardware descriptionHardware description Page 10 of 18
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3.1 Power
EVK-NORA-W36 can be powered from five sources:
Source Component / pin Input range Remarks
USB-C J5 5.0 VDC nominal Power provided by upstream USB port
Li-Ion battery J4 3.3 – 4.2 VDC An external charger may be connected during operation
VIN J10, pin 5 3.3 – 5.5 VDC Arduino power input
VSHLD J10, pins 2 and 4 3.0 – 3.6 VDC Arduino shield power
Power header J8 3.0 – 3.6 VDC
Table 1: EVK-NORA-W36 power sources
These power sources are protected from reverse polarity by protection diodes, allowing multiple
sources to be present simultaneously.
When powering the EVK from either VSHLD or the power header, the Li-Ion battery and USB power
sources can be isolated by cutting jumper NC3 as shown in Figure 7 . This allows connecting
alternative external power sources while still powering the module through J8 or J10, VSHLD .
Figure 7: High-voltage power isolation
After applying power to one of the sources, slide SW1 to the ON position to power on the EVK.
3.2 Reset
An active-low reset signal – nRESET – is connected to the NORA-W36 module, the Arduino header
J10, pin 3, and a momentary button switch. Pressing the switch or driving the signal low resets the
NORA-W36.
nRESET is pulled high internally, so an open-drain source may be used.