MK715x1EK1A Hardware Manual
2. Hardware specifications
FEXK715x1EK1A_HardManual-01
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2.2 Switch
2.2.1 Reset Button
The P0.21 port of MK715x1 is assigned to the hardware reset function. In this evaluation kit, the reset button
is connected to P0.21.
P0.21 (P0_21_RESET in Figure 2-3) is also connected to the Arduino Uno R3
compatible shield connector.
Fig. 2-3: Reset Button
Pushing the reset button puts MK715x1and Arduino Uno R3 compatible shield in reset.
P0.21 and reset button can be completely separated by cutting the solder bridge(SB_RESET).
2.2.2
User buttons
With this evaluation kit, 4 user buttons (Btn1, Btn2, Btn3, Btn4) are available. All buttons are active low (press the
button to connect to GND). In order for the user button to work properly, enable the internal pull-up resistor of the
GPIO port assigned to the user button. GPIO ports and push buttons can be completely separated by cutting the
solder bridge(SB_Btn1, SB_Btn2, SB_Btn3, SB_Btn4). The circuit configuration and port assignment are shown
below.
Fig. 2-4 : User buttons
Button
GPIO Port
Btn1
P0.13
Btn2
P0.14
Btn3
P0.15
Btn4
P0.16
Table. 2-1 : User button GPIO port assignment
