MIKROE-411 mikroElektronika, MIKROE-411 Datasheet - Page 25

• Manufacturer Part Number: MIKROE-411
• Description: Development Boards & Kits - PIC / DSPIC EASYPIC6 DEVELOPMENT SYSTEM
• Manufacturer: mikroElektronika

Specifications of MIKROE-411

• Rohs: yes
• Product: Development Kits
• Core: PIC
• Interface Type: CAN, IDC10, JTAG, RS-232, USB
• Operating Supply Voltage: 9 V to 32 V
• Data Bus Width: 8 bit
• Description/function: Development Board Only, Touch Screen, Pencil, DS1820, LCD, Serial Cable, GLCD are not included
• Dimensions: 265 mm x 220 mm
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• For Use With: PIC16F887

EasyPIC6 Development System
Pull-up/pull-down resistors enable voltage signal to be brought to the microcontroller pins. The logic level at pin idle state depends on the
pull-up/pull-down jumper position. The RB0 pin along with the relevant DIP switch SW2, jumper J2 and RB2 push button with jumper J17 are
used here for the purpose of explaining the performance of pull-up/pull-down resistors. The principle of their operation is identical for all the
microcontroller pins.
Figure 19-5: Jumper J2 in pull-down and J17 in pull-up positions
Jumper J2 in pull-up and J17 in pull-down positions
Jumpers J2 and J17 in the same position
In order to enable PORTB pins to be connected to
pull-down resistors, it is necessary to set jumper J2
in the lower position, thus providing 8x10K resistor
network with a logic zero (0V). To bring a signal to
the RB0 pin, it is necessary to set switch 1 on the DIP
switch SW2 to the ON position. This will cause the
microcontroller RB0 pin to be ‘pulled down’ to the low
logic level (0V) in its idle state.
Jumper J17, used to determine the pin logic state
provided by pressing push-buttons, should be set in
the opposite position of jumper J2.
Accordingly, every time you press the RB0 push
button, a logic one (1) will appear on the RB0 pin.
In order to enable PORTB pins to be connected to
pull-up resistors, it is necessary to set jumper J2 in
the upper position (5V) and jumper J17 in the lower
position (0V). This enables each PORTB pin to be
‘pulled up’ to the high logic level (5V) in its idle state.
In order to do this, it is necessary to set appropriate
switch on the DIP switch SW2 to the ON position.
Accordingly, every time you press the RB0 push
button, a logic zero (0) will appear on the RB0 pin.
In this case, jumpers J2 and J17 have the same logic
state which means that pressing push button will not
cause any pin to change its logic state.
MikroElektronika
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