Datasheet

page 18
v7
One of the most distinctive features of EasyPIC Fusion
™
v7 are it’s Input/Output PORT groups. They add so much
to the connectivity potential of the board.
Everything is grouped together
PORT headers, PORT buttons and PORT LEDs next to each other and grouped
together. It makes development easier, and the entire EasyPIC Fusion
™
v7 cleaner
and well organized. We have also provided an additional PORT headers on the right side of the board, so you can access any pin you want from that side of
the board too.
Tri-state pull-up/down DIP switches
Tri-state DIP switches, like SW7 on Figure 6-3, are
used to enable 4K7 pull-up or pull-down resistor on
any desired port pin. Each of these switches has three
states:
1. middle position disables both pull-up and pull-down
feature from the PORT pin
2. up position connects the resistor in pull-up state to
the selected pin
3. down position connects the resistor in pull-down
state to the selected PORT pin.
Figure 6-1: I/O group contains PORT header, tri-state pull
up/down DIP switch, buttons and LEDs all in one place
Input/Output Group
connectivity
LD42LD41 LD51LD50
RN42
10K
RN41
10K
RN51
10K
RN50
10K
T42T41 T51T50
LD48
RN48
10K
T48
LD47
RN47
10K
T47
LD46
RN46
10K
T46
LD49
RN49
10K
T49
RF12 RF13
RF12
RF13
RF0
RF1
RF2 RF3 RF4
RF5
RF0
RF1
RF2
RF3
RF4
RF5
VCC-3.3V VCC-3.3V
VCC-3.3V
UP
DOWN
PULL
1 2 3 4 5 6 7 8
+
_
SW7
CN13 CN16
RF12
RF13 RF12 RF13RF12
RF0 RF1 RF2 RF3 RF4 RF5
RF0 RF1
RF2 RF3
RF4 RF5
RF0 RF1
RF2 RF3
RF4 RF5
RF13
VCC
GND
BUTTON PRESS LEVEL
R26
220
R27
220
VCC-3.3V
J7J6
1 2 3 4 5 6 7 8
+
_
SW10
PORTF_LEVEL
1
2 3 4
5 6 7 8
O
N
SW15
PORTF_LED
DATA BUS
4k7
Figure 6-3: Schematic of the single I/O group connected to microcontroller PORTF
Button press level tri-state DIP
switch is used to determine
which logic level will be
applied to port pins when
buttons are pressed
Figure 6-2:
Tri-state DIP
switch on PORTF