User's Manual

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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:
Pin No. Name Direction Function
1
TxD
Output Transmit Data
2
RxD Input Receive Data
3
CTS - -
4
GND - Ground
NOTE : Ɣ When data receiving, when it removes the communication
cable, it loses a data.