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Table 6-6 below describes the function of the option links associated with Power configuration. The default configuration is indicated by
BOLD text.
Option Link Settings
Reference Function Fitted Alternative (Removed) Related To
R4 Power Source
Board can be powered from PWR
connector
Disable external power connector R14, R21,
R82
R14 Power Source Board is powered from VBUS
Board is powered by another source
R4, R21,
R82
R17 Power Source Connects external 3.3V power source to
Board_VCC
Disconnects external 3.3V power
source from Board_VCC
R41
R21 Power Source
Board can be powered from E8
Disable E8 power source R4, R14,
R82
R23 Microcontroller
Power
Supply
Supply power to Microcontroller
Fit Low ohm resistor to measure
current.
R41 Power Source
Connects regulated 3.3V voltage
source to Board_VCC
Disconnects regulated 3.3V voltage
source from Board_VCC
R41
R76 LCD Power Source LCD powered from External 5V source
PWR.
LCD Powered from a different
source.
R79, R81
R78 CON 5V
connection
CON 5V connected to External power
source PWR.
CON 5V connected to a different
place.
R80, R82
R79 LCD Power Source LCD powered from VBUS 5V source.
LCD powered from a different
source.
R76, R81
R80 CON 5V
connection
CON 5V connected to VBUS 5V source
CON 5V connected to a different
place.
R78, R82
R81 LCD Power Source
LCD powered from Microprocessor 5V
Source.
LCD powered from a different source. R76, R79
R82 CON 5V
connection
CON 5V connected to Microprocessor
5V Source
CON 5V connected to a different place. R4, R14,
R21, R78,
R80
Table 6-6: Power configuration links
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