MIKROE-504 mikroElektronika, MIKROE-504 Datasheet - Page 26

• Manufacturer Part Number: MIKROE-504
• Description: Development Boards & Kits - PIC / DSPIC BIGDSPIC6 DEVELOPMENT SYSTEM
• Manufacturer: mikroElektronika

Specifications of MIKROE-504

• Rohs: yes
• Product: Development Kits
• Core: dsPIC
• Interface Type: ICD, IDC10, RS-232, USB
• Operating Supply Voltage: 5 V, 9 V to 32 V
• Data Bus Width: 16 bit
• Description/function: Development Board Only, Touch Screen, Pencil, LCD, Serial Cable, GLCD not included
• Dimensions: 265 mm x 220 mm
• For Use With: dsPIC30F

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Pull-up/pull-down resistors enable you to set the logic level on all microcontroller’s input pins when they are in idle state. Such level
depends on the position of the pull-up/pull-down jumper. The RD8 pin with the relevant DIP switch SW6, jumper J6 and RD8 push
button with jumper J13 are used here for the purpose of explaining the performance of pull-up/pull-down resistors. The principle of
their operation is the same as for all other microcontroller pins.
MikroElektronika
: Jumper J6 in pull-down position and jumper J13 in pull-up position
Jumper J6 in pull-up and jumper J13 in pull-down position
Jumpers J6 and J13 in the same positions
In order to enable the PORTD port pins to be
connected to pull-down resistors, it is necessary
to place jumper J6 in the Down
This enables any PORTD port pin to be supplied
with a logic zero (0V) in idle state over jumper J6
and 8x10k resistor network. To provide the RD8
pin with such signal, it is necessary to set switch
RD8 on the DIP switch SW6 to the ON position.
As a result, every time you press the RD8 push
button, a logic one (VCC voltage) will appear on
the RD8 pin, provided that jumper J13 is placed
in the VCC position.
In order to enable port PORTD pins to be
connected to pull-up resistors and the port input
pins to be supplied with a logic zero (0), it is
necessary to place jumper J6 in the Up position
and jumper J13 in the GND position.
This enables any port PORTD input pin, when
it is in idle state, to be driven high (5V) over the
10k resistor.
As a result, every time you press the RD8 push
button, a logic zero (0V) will appear on the RD8
pin, provided that the RD8 switch is set to the
ON position.
In case that jumpers J6 and J13 have the same
logic state, pressure on any button will not cause
input pins to change their logic state.
BIGdsPIC6 Development System