Datasheet

4
3. Interface
Pin number
Name
Type
Function Description
1
Vin
in
Positive Power Supply Input Terminal(Line color:Red)
2
TD
out
Serial data output, TTL logic levels(Line color: Yellow)
3
RD
in
Serial data input, TTL logic levels(Line color: White)
4
GND
-
Signal ground(Line color: Black)