Input/Output Group - Mikroe EasyMx PRO v7a Manual

INPUT/OUTPUT GROUP

One of the most distinctive features of EasyMx PRO v7a 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 are next to each other, and
grouped together. It makes development easier, and the entire EasyMx PRO
v7a 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 DIP switch on PORTE/H
Schematic of the single I/O group
connected to microcontroller PORTC
E a s y M x P R O v 7 a U s e r M a n u a l
PC_LED
J24 VCC-MCU
SW3
R80
PRESS_LEVEL
J17
220
DISABLE
PROTECTION
TRI-STATE DIP SWITCHES
Tri-state DIP switches, like SW15 on the image below, are used to enable 4K7
pull-up or pull-down resistor on any desired port pin. Each of those 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.
4k7
RC0 RC1
RC2 RC3
+ 1 2 3 4 5 6 7 8
UP RC4 RC5
PULL RC6 RC7
DOWN
VCC-BRD VCC-BRD
_
SW7 CN15
VCC-MCU
RN8-8 RN8-7 RN8-6 RN8-5
10K 10K 10K 10K
LD24 LD23 LD22
T24 T23 T22
Tri-state DIP
switch
RC0
RC1
RC0 RC1 RC0 RC1 RC2
RC2 RC3 RC2 RC3 RC3
RC4 RC5 RC4 RC5 RC4
RC6 RC7 RC6 RC7 RC5
RC6
VCC-BRD
RC7
CN10 CN20
VCC-BRD
CN25
RN8-4 RN8-3 RN8-2 RN8-1
10K 10K 10K 10K
LD21 LD20 LD19 LD18 LD17
T21 T20 T19 T18 T17
1
2
3
4
5
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9
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