User's Manual

User Manual
SM3000 OEM module
6.2.4 UART interface
Physical connections
The following pictures shows the physical connections needed to enable serial communication. The arrow
indicates the direction of information flow.
Assumed is that SM3000 and host are either powered by the same power supply and use the same voltage to
drive the pins or are separated through an RS232 level converter. The (signal) ground line should be shared.
Pin mapping for SM3000
Pin Description Voltage levels
DSR Data Set Ready VDD
RTS Request to Sent VDD
CTS Clear to Sent VDD
DTR Data Terminal Ready VDD
TX Transmit VDD
RX Receive VDD
VCC Supply voltage VDD
GND Signal ground –
15/27 Ambient Systems B.V.