Telit Wireless Solutions GE863-QUAD - Manual (Page 25)

GE863-QUAD
GE863-PY
1vv0300715 Rev. 1 - 19/09/06
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved page 25 of 79
The signals of the GE863-QUAD/PY serial port are:
RS232
Pin
Number
Signal GE863-
QUAD/PY
Pad Number
Name Usage
1 DCD -
dcd_uar
t
42 Data Carrier Detect Output from the GE863-QUAD/PY that
indicates the carrier presence
2 RXD -
tx_uart
38 Transmit line
*see Note
Output transmit line of GE863-QUAD/PY
UART
3 TXD -
rx_uart
37 Receive line
*see Note
Input receive of the GE863-QUAD/PY
UART
4 DTR -
dtr_uart
39 Data Terminal
Ready
Input to the GE863-QUAD/PY 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-QUAD/PY that
indicates the module is ready
7 RTS -
rts_uart
40 Request to Send Input to the GE863-QUAD/PY that
controls the Hardware flow control
8 CTS -
cts_uart
41 Clear to Send Output from the GE863-QUAD/PY that
controls the Hardware flow control
9 RI -
ri_uart
44 Ring Indicator Output from the GE863-QUAD/PY 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-QUAD/PY 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-QUAD/PY serial port and viceversa for RX.
TIP: For a minimum implementation, only the TXD and RXD lines can be connected, the
other lines can be left open provided a software flow control is implemented.
The signals in the UART connector on the EVK are:
DCD RXD
TXD DTR
GND DSR
RTS CTS
RI GND