29
Reference Voltage(V)
Reference Resistance
Pin Function
Without
signal
With
signal
Forward(
Ω
) Backward(
Ω
)
19 Vacant
pin
0
0
620
10000
20 Vacant
pin
0
0
620
10000
21 Grounding
0
0
0
0
22
Red primary color character
output
0 0 620 2200
Circuit Explanation