TECHNICAL MANUAL
Telit GM862-GPS
Quad Band GPS Data Terminal Module
Pag.17 of 79
Rev. 0
3.5.1 Logic level specification
Where not specifically stated, all the interface circuits work at 2.72V CMOS logic levels.
The following table shows the logic level specifications in the Telit GM862-QUAD/QUAD-
PY Transceiver module interface circuits:
LEVEL
MIN
MAX
Input high level
1.9 V
3.3 V
Input low level
-0.2 V
0.5 V
Output high
level@1mA
2.15 V
2.8 V
Output low level
@1mA
0 V
0.2 V
Operating Range - Current Capability
Current
Min
Max
Current Output Low I
OL
- 1mA
Current Output High I
OH
-
1mA
Buffered Current Output High I
BOH
(
2
) - -
Buffered Current Output Low I
BOL
(
2
)
2mA 20mA
Buffered Current Input High I
BIH
(
1
) -
0.5mA
Buffered Current Input Low I
BIL
(
1
)
- 30uA
(
1
) For GPIO1 pin - base input.
(
2
) For GPIO2 pin - Open Collector.
3.5.2 Reset signal
RESET is used to reset the Telit GM862-GPS Transceiver module. Whenever this signal is
pulled low, the GM862-GPS is reset and Re-booted.
CONNECTOR
PIN
I/O
SIGNAL
FUNCTION
SO301 23
I RESET
Module
reset
and
Reboot
NOTE:
do not use this signal to power off the Telit GM862-GPS module.
Use the ON/OFF signal (Pin 17 of SO301) to perform this function.
Signal levels:
SIGNAL
MIN
MAX
RESET Input high
2.2 V
3.3 V
RESET Input low
0 V
0.2 V
If unused, this signal may be left unconnected.
