EVK-JODY-W3 - User guide
UBX-20030840 - R04
Board description
Page 14 of 29
3.3
Power supply configuration
JODY-W3 series modules must be supplied with 1.8 V (
1V8
), 3.3 V (
3V3
), and a
VIO
voltage that can
be either 1.8 V or 3.3 V. The power supply for the EVB can be provided over the different host
interfaces or from external sources.
The following power supply options are available on the EVB:
•
PCIe, SDIO, USB interfaces: The EVB is powered through the host interface. All internal voltages
are generated by DC-DC converters on the EVB.
•
Common external power supply: The EVB can be connected to an external (5 V to 24 V) power
supply through a 2.1 x 6.3 mm DC power jack (J11). DC-DC converters are used for generating all
the required internal voltages.
•
Separate external supplies: All the individual,
3V3
,
1V8,
and
VIO
voltage rails are supplied from
external power sources through the connectors J101-J103.
Figure 7 shows the external connectors and jumpers used for configuring the different power supply
options.
Figure 7: Overview of EVB power supply configuration
Jumpers for input
voltage selection
for the module
Jumper for power
supply selection
Power supply
status LEDs
J101-J103 connectors (bottom
side) for separately supplying the
3V3, 1V8 and VIO voltage rails
Common external
power supply
connector
