Datasheet

Figure 6-4: IDC10 male headers enable easy
connection with mikroElektronika accessory boards
connectivity
page 19
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 EasyMx PRO
™
v7 for STM32 board
uses low-current LEDs with typical current consumption
of 0.2mA or 0.3mA. Board
contains 67 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
PA0
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 SW10.1 in VCC position, then
pressing of any push button in PORTA/H 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
In the far upper right section of the
board, there is a RESET button, which
can be used to manually reset the
microcontroller.
Figure 6-5: Button press
level DIP switch (tri-state)
With enhanced connectivity as one of the key features
of EasyMx PRO
™
v7 for STM32, we have provided two
connection headers for each PORT. I/O PORT group
contains one male IDC10 header (like CN1 Figure 6-3).
There is one more IDC10 header available on the
right side of the board, next to DIP switches (like CN4
on Figure 6-3). These headers can be used to connect
accessory boards with IDC10 female sockets.
EasyMx PRO
v7