Datasheet

page 19
v7
Figure 6-4: IDC10 male headers enable easy
connection with MikroElektronika accessory boards
connectivity
Headers Buttons LEDs
LED (Light-Emitting
Diode) is a highly
ecient electronic
light source. When
connecting LEDs,
it is necessary to
place a current
limiting resistor in
series so that LEDs
are provided with
the current value
specied by the manufacturer. The current varies
from 0.2mA to 20mA, depending on the type of the
LED and the manufacturer. The EasyPIC Fusion
™
v7
board uses low-current LEDs with typical current
consumption of 0.2mA or
0.3mA. Board contains 68
LEDs which can be used
for visual indication of the
logic state on PORT pins.
An active LED indicates
that a logic high (1) is
present on the pin. In order
to enable PORT LEDs, it is
necessary to enable the
corresponding DIP switch
on SW15 (Figure 6-6).
Figure 6-6: SW15.1
through SW15.8
switches are used to
enable PORT LEDs
53
55
57
59
61
63
65
67
69
71
73
75
77
54
56
58
60
62
64
66
68
70
72
74
76
78
RE4
SMD LED
SMD resistor
limiting current
through the LED
The logic state of
all microcontroller
digital inputs may
be changed using
push buttons. Tri-
state DIP switch
SW10 is available
for selecting which
logic state will be applied to corresponding MCU pin when
button is pressed, for each I/O port separately. If you, for
example, place SW10.6 in VCC position, then pressing
of any push button in PORTF I/O group will apply logic
one to the appropriate microcontroller pin. The same goes
for GND. If DIP switch is in the middle position neither
of two logic states will be applied to the appropriate
microcontroller pin. You can disable pin protection 220ohm
resistors by placing jumpers J6 and J7, which will connect
your push buttons directly to VCC or GND. Be aware that
doing so you may accidentally damage MCU in case of
wrong usage.
Reset Button
Figure 6-5: Button press
level DIP switch (tri-state)
With enhanced connectivity as one of the key features of
EasyPIC Fusion
™
v7, we have provided two connection
headers for each PORT. I/O PORT group contains one
male IDC10 header (like CN13 Figure 6-3). There is
one more IDC10 header available on the right side of
the board, next to DIP switches (like CN16 on Figure
6-3). These headers can be used to connect accessory
boards with IDC10 female sockets.
In the far upper right section of the
board, there is a RESET button, which
can be used to manually reset the
microcontroller.