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 6 of 94
7.2.2.
Transmission line measurements .............................................................................................................. 48
7.2.3.
GSM Antenna – Installation Guidelines ................................................................................................... 50
7.3.
GPS
A
NTENNA
(GE864-GPS
ONLY
) .................................................................................................................. 50
7.3.1.
GPS Antenna Requirements ..................................................................................................................... 50
7.3.2.
Combined GPS Antenna ........................................................................................................................... 50
7.3.3.
Linear and Patch GPS Antenna................................................................................................................ 50
7.3.4.
GPS Antenna - PCB Line Guidelines ....................................................................................................... 51
7.3.5.
GPS Antenna - Installation Guidelines .................................................................................................... 51
8.
LOGIC LEVEL SPECIFICATIONS ...................................................................................................... 52
8.1.
R
ESET
S
IGNAL
................................................................................................................................................... 53
9.
SERIAL PORTS ............................................................................................................................... 54
9.1.
MODEM
SERIAL
PORT .................................................................................................................................. 54
9.2.
GE864-GPS
S
ECONDARY
P
ORTS
....................................................................................................................... 56
9.2.1.
Modem Serial Port 2 (GPS Control) ........................................................................................................ 56
9.2.2.
GPS Serial Port (NMEA) .......................................................................................................................... 57
9.3.
RS232
L
EVEL
T
RANSLATION
............................................................................................................................. 57
9.4.
5V
UART
L
EVEL
T
RANSLATION
....................................................................................................................... 59
10.
AUDIO SECTION OVERVIEW ........................................................................................................ 61
10.1.
S
ELECTION MODE
............................................................................................................................................... 61
10.2.
E
LECTRICAL
C
HARACTERISTICS
........................................................................................................................ 63
10.2.1.
Input Lines Characteristics ...................................................................................................................... 63
10.2.2.
Output Lines Characteristics .................................................................................................................... 64
11.
GENERAL PURPOSE I/O ............................................................................................................. 66
11.1.
GPIO
L
OGIC
L
EVELS
......................................................................................................................................... 67
11.2.
U
SING A
GPIO
P
AD AS
INPUT .......................................................................................................................... 67
11.3.
U
SING A
GPIO
P
AD AS
OUTPUT ...................................................................................................................... 68
11.4.
U
SING THE
RF
T
RANSMISSION
C
ONTROL
GPIO4............................................................................................... 68
11.5.
U
SING THE
RFTXMON
O
UTPUT
GPIO5 ........................................................................................................... 68
11.6.
U
SING THE
A
LARM
O
UTPUT
GPIO6................................................................................................................... 68
11.7.
U
SING THE
B
UZZER
O
UTPUT
GPIO7 .................................................................................................................. 69
11.8.
U
SING THE
T
EMPERATURE
M
ONITOR
F
UNCTION
............................................................................................... 70
11.8.1.
Short Description ..................................................................................................................................... 70
11.8.2.
Allowed GPIO .......................................................................................................................................... 70
11.9.
I
NDICATION OF
N
ETWORK
S
ERVICE
A
VAILABILITY
........................................................................................... 72
11.10.
RTC
B
YPASS
O
UT
......................................................................................................................................... 73
11.11.
E
XTERNAL
SIM
H
OLDER
I
MPLEMENTATION
................................................................................................. 73
11.12.
VAUX
P
OWER
O
UTPUT
(
ONLY FOR
GE864-GPS) ......................................................................................... 73
12.
GPS FEATURES (ONLY GE864-GPS) ............................................................................................ 74
12.1.
GPS
C
ONTROL
................................................................................................................................................... 74
12.1.1.
GSM Controlled Mode ............................................................................................................................. 74
12.1.2.
External Host Controlled Mode ............................................................................................................... 74
12.2.
PPS
GPS
O
UTPUT
.............................................................................................................................................. 75
12.2.1.
Description ............................................................................................................................................... 75
12.2.2.
Pulse Characteristics ............................................................................................................................... 75
13.
DAC AND ADC CONVERTER ........................................................................................................ 76
13.1.
DAC
C
ONVERTER
.............................................................................................................................................. 76
