NEC Release-it, Hardware Manual

Page: 14 / 30

CHAPTER 2 SWITCHES, JUMPERS, AND LEDS
14 UM U17586EE1V0UM00
2.2
SW1
SW1is a 4 directional switch with center push. If it is directed or pushed, the P7*/KR* input is set to
GND. Otherwise the circuit is open. Therefore please set the on-chip pull-up resistors at P7*/KR*
during initializing routine of your program code. For more detail, please refer to the User’s manual of
the
µ
PD78F0148HD MCU.
4-directional/center-push switch SW1, ALPS SKRHADE010
SW1 Name MCU Pin Description
1 P72 P72/KR2 UP
2 P73 P73/KR3 CENTER PUSH
3 P74 P74/KR4 LEFT
4 P75 P75/KR5 RIGHT
5 GND GND
6 P76 P76/KR6 DOWN
SW1
2.3
SW2 and SW3
SW2 and SW3 are tact switches. The port inputs are short-circuited to ground, while they are being
pushed, and kept open otherwise. Therefore please set the on-chip pull-up resistors at the ports during
initializing routine of your program code. For more detail, please refer to the User’s manual of the
µ
PD78F0148HD MCU.
Tact switches SW2 and SW3, ALPS SKQMBBE010
Name MCU Pin Description
SW2 P70 P70/KR0
SW3 P71 P71/KR1
2.4
SW6
SW6 is the hardware reset.
Board Edge
UP
Docume
Date Pu
RIGHT LEFT