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Connector pin-out			Arduino test rig
Pin#	Label	Description	Pin
1	Vss	Ground	GND
2	Vdd	Power supply for logic	+5V
3	Vo	Contrast adjustment	³⁾
4	RS	Data/Instruction select signal	8
5	R/W	Read/Write select signal	GND
6	E	Enable signal	9
7	DB0	Data bus line
8	DB1	Data bus line
9	DB2	Data bus line
10	DB3	Data bus line
11	DB4	Data bus line	4
12	DB5	Data bus line	5
13	DB6	Data bus line	6
14	DB7	Data bus line	7
15	A	Power supply for B/L +	4V
16	K	Power supply for B/L -	0v