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20
Users Guide
XE1401SK Hardware
5.3.8
Power Supply For XE1401SK (JP13)
The XE1401SK power source can be chosen by JP13. The selected input source is regulated to 3.0V through the
on board voltage regulator U4. It supplies the XE1401, XE3006, radio module as well as the RS232 level shifter
and required glue logic.
JP13 Position
Description
I
max
Regulated
BATTERY
3.2V DC Nominal from batteries regulated to 3.0V through U4
200 mA
YES
USB_5V
5V DC from USB port regulated to 3.0V and 3.3V through U4 and U5
200 mA
YES
EXT_POWER
DC voltage ( 4 – 10 V ) from the external power supply,
regulated to 3.0V through U4
200 mA
YES
OPEN
No power supply is selected, the XE1401SK is not power supplied
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