Datasheet
25
BIG
AVR
6 Development System
MikroElektronika
page
21.0. Input/Output Ports
Along the right side of the development system, there are eleven 10-pin connectors which are connected to the microcontroller’s I/O
ports. Pins PB1, PB2, PB3, PE0 and PE1 are used for programming and therefore are not directly connected to the appropriate 10-
pin connectors, but via the programmer’s multiplexer. DIP switches SW1-SW11 enable each connector pin to be connected to one
pull-up/pull-down resistor. Whether pins of some port are to be connected to a pull-up or a pull-down resistor depends on the position
of jumpers J1-J11.
)LJXUH: Port PORTA connection schematic
)LJXUH J2 in pull-down
position
)LJXUH J2 in pull-up
position
Jumper for pull-up/pull-
down resistor selection
)LJXUH: I/O ports
DIP switch to turn on pull-
up/pull-down resistors for
each port pin
PORTG 2x5 male connector
Additional module connected
to PORTC
3RUW3257$SLQVDUHFRQQHFWHGWR
SXOOGRZQUHVLVWRUV