User manual

JUMPER DESCRIPTION:
SMD jumper description
B4_E The B4_E jumper connects Button 4 with PB6/PGC pin of
PIC18F4550. In debug mode please do not press Button 4 as
this will corrupt ProgramClock PB6 line and the result will be
not predictable
Default state - closed i.e. Button 4 is enabled
B3_E The B3_E jumper connects Button 3 with PB7/PGD pin of
PIC18F4550. In debug mode please do not press Button 3 as
this will corrupt ProgramData PB7 and the result will be not
predictable.
Default state - closed i.e. Button 3 is enabled
PTH jumper description:
EXT/USB The EXTernal/USB jumper defines the power source which
supply the board.
EXT position – The board is supplied from PWR_JACK(6VAC or
9VDC).
USB position – The board is supplied from USB type B
connector.
Default state EXT
CP/B2 CP position – Card Present pin of SD/MMC socket is
connected to PB4(pin37)
B2 position – Button 2 is connected to PB4(pin37).
Button 2 is used for boot mode entry. If CP/B2 jumper is in B2
state and B2 is pressed at power up, the board enters in boot
mode.
Default state B2