22
UNI-DS3 Development System
MikroElektronika
page
18.0.
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Along the right side of the development system, there are nine 10-pin connectors which are connected to the microcontroller’s I/O
ports. Microcontroller pins used for programming are not directly connected to the appropriate 10-pin connectors, but via a multiplexer.
The multiplexer is provided on the MCU card and is connected to the programmer. Microcontroller pins can be connected to pull-up/
pull-down resistors by means of jumpers J1-J9. All pull-up/pull-down resistors together form a resistor network which can be removed
and replaced with another one. If pull-up/pull-down resistors are not used, it is necessary to remove them or jumpers (J0-J9).
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: Port PORTB connection schematic
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J3 in pull-down
position
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J3 in pull-up
position
Jumper for pull-up/pull-
down resistor selection
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: I/O ports
Resistor network may be
removed and replaced
with another one
PORTF 2x5 male connector
Additional module connected
to PORTC
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connected to pull-down
resistors
