Powering Smart Rf ® 04Eb - Texas Instruments CC1110-CC1111DK User Manual

6.1 Powering SmartRF
If several power sources are connected to SmartRF
the supply that supplies the highest voltage.
The Power Switch S3 must be set according to what power source is used. If 3.3V is applied
using the power terminal block, the switch should be set to the left position. In all other cases,
the switch should be set to the right position for power to be applied to the SmartRF
This switch can be used to turn off the SmartRF
of that used to turn it on.
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The SmartRF 04EB can be powered in several different ways:
•
DC jack connector with standard DC jack power connectors with a 2.5mm centre pin. The
centre pin is used for the positive voltage. A 4-10V DC power supply should be used. The
onboard voltage regulator supplies 3.3V to the board.
•
Laboratory power supply. Ground should be connected to the 0V terminal on the power
connector (see Figure 5). A 4-10V supply can be connected to the "4-10V" terminal, or a
3.3V supply can be connected to the "3.3V" terminal. The on-board voltage regulators will
be bypassed when using the "3.3V" terminal. Therefore it is important that the voltage
level is within these limits:
2.7V-3.6V when the USB interface is not active.
o
3.0V-3.6V when the USB interface is active.
o
•
USB power. If the SmartRF
power from the USB bus. The onboard voltage regulator supplies 3.3V to the board.
•
Battery power. The evaluation board includes a 9V-type battery connector on the bottom
side of the PCB. A 9V battery or a battery pack that uses a 9V-type connector can be
connected to this battery connector. The onboard voltage regulator supplies 3.3V to the
board.
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04EB
Figure 4: Power switch setting
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04EB by switching it to the opposite position
Figure 5: Power connector
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04EB is connected to a USB socket on a PC, it will draw
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CC1110/CC2510
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04EB, the board will be powered from
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04EB.
swru134a