GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.5 – 2011-10-03
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved.
Page 55 of 94
Operating Range
–
Interface levels (2.8V CMOS)
GPS signals
Level
Min
Max
Min
Max
Input high level
2.1V
3.1V
1.82V
2.8V
Input low level
0V
0.5V
0V
0.98V
Output high level
2.2V
3.0V
2.4V
Output low level
0V
0.35V
0.4V
The table below shows the signals of the GE/GC864-QUAD V2 AND GE864-GPSserial port:
NOTE:
According to V.24, RX/TX signal names are referred to the application side, therefore on the
GE/GC864-QUAD V2 AND GE864-GPSside 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 GE/GC864-QUAD V2 AND GE864-GPSserial port and viceversa for RX
RS232
Pin
Number
Signal
GE864-QUAD V2
Pad Number
GC864-QUAD V2
Pad Number
Name
Usage
1
DCD –
dcd_uart
D9
32
Data Carrier Detect
Output from the GE864-QUAD V2 that
indicates the carrier presence
2
RXD –
tx_uart
H8
26
Transmit line
*see Note
Output transmit line of GE864-QUAD
V2 UART
3
TXD –
rx_uart
E7
25
Receive line
*see Note
Input receive of the GE864-QUAD V2
UART
4
DTR –
dtr_uart
B7
29
Data Terminal Ready
Input to the GE864-QUAD V2 that
controls the DTE READY condition
5
GND
A1,F1, H1 L1, H2, L2,
J3, K3….
5,6,7
Ground
ground
6
DSR –
dsr_uart
E11
27
Data Set Ready
Output from the GE864-QUAD V2 that
indicates the module is ready
7
RTS –
rts_uart
F7
31
Request to Send
Input to the GE864-QUAD V2 that
controls the Hardware flow control
8
CTS –
cts_uart
F6
28
Clear to Send
Output from the GE864-QUAD V2 that
controls the Hardware flow control
9
RI – ri_uart B6
30
Ring Indicator
Output from the GE864-QUAD V2 that
indicates the incoming call condition