Download 1vv0300714_GE863

GE863-GPS Hardware User Guide
1vv0300714 Rev.4 - 20/09/06
Operating Range - Interface levels (2.8V CMOS)
Level
Min
Max
Input high level
VIH
2.1V
Input low level VIL 0V
Output high level VOH 2.2V
Output low level VOL 0V
3.3V
0.5V
3.0V
0.35V
The signals of the GE863-GPS serial port are:
RS232
Signal GE863-GPS
Name
Usage
Pin
Pad Number
Number
1
DCD 42
Data Carrier Detect
Output from the GE863-GPS that
dcd_uar
indicates the carrier presence
t
2
RXD 38
Transmit line *see Note Output transmit line of GE863-GPS UART
tx_uart
3
TXD 37
Receive line *see Note
Input receive of the GE863-GPS UART
rx_uart
4
DTR 39
Data Terminal
Input to the GE863-GPS that controls the
dtr_uart
Ready
DTE READY condition
5
GND
8-17-28-36Ground
ground
45-48-50-56
6
DSR 43
Data Set Ready
Output from the GE863-GPS that
dsr_uart
indicates the module is ready
7
RTS 40
Request to Send
Input to the GE863-GPS that controls the
rts_uart
Hardware flow control
8
CTS 41
Clear to Send
Output from the GE863-GPS that controls
cts_uart
the Hardware flow control
9
RI 44
Ring Indicator
Output from the GE863-GPS that
ri_uart
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.
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.
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved
page 30 of 90