MIKROE-419 mikroElektronika, MIKROE-419 Datasheet - Page 25

• Manufacturer Part Number: MIKROE-419
• Description: Development Boards & Kits - PIC / DSPIC BIGPIC6 DEVELOPMENT SYSTEM
• Manufacturer: mikroElektronika

Specifications of MIKROE-419

• Rohs: yes
• Product: Development Kits
• Core: PIC
• Interface Type: ICD, 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 not included
• Dimensions: 265 mm x 220 mm
• For Use With: PIC

BigPIC6 Development System
BigPIC6 Development System
Pull-up/pull-down resistors enable you to set the logic level on all microcontroller input pins when they are in idle state. Such level
depends on the position of the pull-up/pull-down jumper. The RB0 pin with the relevant DIP switch SW2, jumper J2 and RB0 push
button with jumper J12 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: JumperJ2 in pull-down and jumper J12 in pull-up position
Figure 19-6: Jumper J2 in pull-up and jumper J12 in pull-down position
Figure 19-7: Jumpers J2 and J12 in the same position
VCC
VCC
RH2
RH3
RE1
RE0
RG0
RG1
RG2
RG3
MCLR
RG4
GND
VCC
RF7
RF6
RF5
RF4
RF3
RF2
RH7
RH6
RH2
RH3
RE1
RE0
RG0
RG1
RG2
RG3
MCLR
RG4
GND
VCC
RF7
RF6
RF5
RF4
RF3
RF2
RH7
RH6
PIC18Fxx
PIC18Fxx
down
pull
up
VCC
VCC
VCC
J2
VCC
VCC
VCC
J12
OSC2
OSC1
OSC2
OSC1
GND
GND
VCC
VCC
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
RC5
RC4
RC3
RC2
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
RC5
RC4
RC3
RC2
RJ2
RJ3
RJ7
RJ6
RJ2
RJ3
RJ7
RJ6
0V
5V
VCC
VCC
down
down
pull
pull
up
up
VCC
VCC
J2
J2
0V
0V
5V
5V
RN2
SW2
RB0
RN2
SW2
RB0
J13
J13
8x10K
8x10K
R58
220R
R58
220R
VCC
VCC
J12
J12
In case that jumpers J2 and J12 have the same
logic state, pressure on any button will not cause
input pins to change their logic state.
In order to enable the port PORTB pins to be
connected to the pull-down resistors, fi rst it is
necessary to set jumper J2 in the Down position.
This enables any port PORTB pin to be provided
with a logic zero (0V) in idle state over jumper J2
and 8x10K resistor network. To provide the RB0
pin with such signal, it is necessary to set switch
RB0 on the DIP switch SW2 in the ON position.
As a result, every time you press the RB0 push
button, a logic one (1) will appear on the RB0
pin, provided that jumper J12 is set in the VCC
position.
In order to enable port PORTB pins to be
connected to pull-up resistors and port input pins
to be activated with logic zero (0), it is necessary
to set jumper J2 in the Up position (5V) and
jumper J12 in the GND position (0V).
This enables any port PORTB input pin to be
provided with a logic one (5V) in idle state over
the 10k resistor. The RB0 switch should be set
in the ON position afterwards.
As a result, every time you press the RB0 push
button, a logic zero (0) will appear on the RB0
pin.
MikroElektronika
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