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The Porti-SM40 printer has a RS-232C or TTL interface and is connected by means
of a 4 pin mini USB socket.
In the following table, the signals present on the Mini-
USB socket are listed:
* Applicable connector : SUNG KYUNG (CM-720)
Pin No.
Name
Direction
Function
1
TxD
Output
Transmit Data
2
RxD
Input
Receive Data
3
CTS
-
-
4
GND
-
Ground
NOTE :
●
When data receiving, when it removes the communication
cable, it loses a data.
