User's Manual

Telit GE863-QUAD / GE863-PY
Hardware User guide
1vv0300715, Rev. ISSUE#0, - 21/02/06
Reproduction forbidden without Telit Communication written authorization – All Right reserved – Right of modification reserved page 22 of 71
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
5.2 MODEM SERIAL PORT 2 (DEBUG)
It is available on the following pins:
PIN # NAME DESCRIPTION TYPE
25 TX_TRACE TX Data CMOS 2.8V
26 RX_TRACE RX Data CMOS 2.8V