GigaDevice Semiconductor GD32450Z-EVAL - Key Input Circuits

User Guide
GD32450Z-EVAL
11
PD4
PD5
LED1
LED0603
LED2
LED0603
R11
470Ω
R12
470Ω
LED
LED1
LED2
PG3
LED3
LED0603
R14
470Ω
LED3
4.4. KEY
Figure 4-4 Schematic diagram of Key function
KEY1
K2
K-1102B
R15
10KΩ
+3V3
GND
C29
50V/0.1uF
KEY2
K3
K-1102B
R16
10KΩ
+3V3
GND
C30
50V/0.1uF
KEY3
K4
K-1102B
R17
10KΩ
+3V3
GND
C31
50V/0.1uF
KEY1
KEY2
KEY3
PA0
PC13
PB14
KEY