Reset Button, Sw3; Navigation Switch, Sw1; Led1; Led2 - NEC 78K0R - Cool it! User Manual

78K0R - Cool it!

3.2 RESET button, SW3

SW3 is the reset button. It activates the power on reset. Switch SW3 controls the reset input signal of the
78K0R/KG3 microcontroller.

3.3 Navigation switch, SW1

Button SW1 is a navigation switch connected to the key interrupt input of the 78K0R/KG3 device. It
operates in five directions including a center push function. The connection of SW1 is shown in the table
below:

3.4 LED1

LED1 is connected to I/O pin P145 / TI07 / TO07 of the 78K0R/KG3 microcontroller. A low signal output
at this I/O pin switches the LED on.

3.5 LED2

LED2 is connected to I/O pin P46 / INTP1 / TI05 / TO05 of the 78K0R/KG3 microcontroller. A low signal
output at this I/O pin switches the LED on.

3.6 Power LED, LED3

LED3 is the power LED of the 78K0R – Cool it! board. It indicates if power is applied to the 78K0R – Cool
it! board.

Table 8: Navigation switch SW1

User's Manual U18426EE1V0UM00
SW1 Connection to the
78K0R/KG3 device
Left P72/KR2
Down P74/KR4
Select P71/KR1
Right P73/KR3
Up P70/KR0
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