User's Manual

Telit GE863-GPS
Hardware User guide
1vv0300714, Rev. ISSUE#0, - 21/02/06
Reproduction forbidden without Telit Communication written authorization – All Right reserved – Right of modification reserved page 25 of 76
Operating Range - Interface levels (2.8V CMOS)
Level Min Max
Input high level V
IH
2.1V 3.3V
Input low level V
IL
0V 0.5V
Output high level V
OH
2.2V 3.0V
Output low level V
OL
0V 0.35V
The signals of the GE863-GPS serial port are:
RS232
Pin
Number
Signal GE863-GPS
Pad Number
Name Usage
1 DCD -
dcd_uart
42 Data Carrier Detect Output from the GE863-GPS that indicates
the carrier presence
2 RXD -
tx_uart
38 Transmit line *see Note Output transmit line of GE863-GPS
UART
3 TXD -
rx_uart
37 Receive line *see Note Input receive of the GE863-GPS UART
4 DTR -
dtr_uart
39 Data Terminal Ready Input to the GE863-GPS that controls the
DTE READY condition
5 GND 8-17-28-36-
45-48-50-56
Ground ground
6 DSR -
dsr_uart
43 Data Set Ready Output from the GE863-GPS that indicates
the module is ready
7 RTS -
rts_uart
40 Request to Send Input to the GE863-GPS that controls the
Hardware flow control
8 CTS -
cts_uart
41 Clear to Send Output from the GE863-GPS that controls
the Hardware flow control
9 RI -
ri_uart
44 Ring Indicator Output from the GE863-GPS that indicates
the incoming call condition
NOTE: According to V.24, RX/TX signal names are referred to the application side, therefore on the
GE863-GPS side these signal are on the opposite direction: TXD on the application side will be
connected to the receive line (here named TXD/ rx_uart ) of the GE863-GPS serial port and
viceversa for RX.