
17
Appendix B Keypad
A. Block Diagram
B. Jumper Setting
CON1
Pin1 Pin2 Pin3 Pin4 Pin5
+5V in
GND
GND
DATA
CLOCK
CON2
Pin1 Pin2 Pin3 Pin4 Pin5
+5V in
GND
GND
DATA
CLOCK
CON3
Pin1 Pin2 Pin3 Pin4 Pin5
+5V in
GND
GND
DATA
CLOCK
A203
Membrane 1
Membrane 2
Keyboard 1
Keyboard 2
PC
CON1
JP4
CON2
CON
JP3
JP1