GL865 Hardware User Guide
1vv0300910 Rev.1 – 2011-07-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 4 of 79
Contents
1.
INTRODUCTION ......................................................................................................................................................... 6
1.1.
S
COPE
......................................................................................................................................................................... 6
1.2.
A
UDIENCE
.................................................................................................................................................................... 6
1.3.
C
ONTACT
I
NFORMATION
,
S
UPPORT
.................................................................................................................................. 6
1.4.
D
OCUMENT
O
RGANIZATION
............................................................................................................................................ 6
1.5.
T
EXT
C
ONVENTIONS
....................................................................................................................................................... 7
1.6.
R
ELATED
D
OCUMENTS
................................................................................................................................................... 8
1.7.
D
OCUMENT
H
ISTORY
..................................................................................................................................................... 8
2.
OVERVIEW .............................................................................................................................................................. 10
3.
GL865 MECHANICAL DIMENSIONS .......................................................................................................................... 12
4.
GL865 MODULE CONNECTIONS ............................................................................................................................... 13
4.1.
PIN-OUT .................................................................................................................................................................. 13
4.2.
P
IN
L
AYOUT
............................................................................................................................................................... 16
5.
HARDWARE COMMANDS ........................................................................................................................................ 17
5.1.
A
UTO
-T
URNING
ON
THE
GL865 ................................................................................................................................... 17
5.2.
T
URNING
OFF
THE
GL865 ........................................................................................................................................... 19
5.3.
R
ESETTING THE
GL865 ................................................................................................................................................ 21
5.3.1.
Hardware Unconditional restart .................................................................................................................... 21
6.
POWER SUPPLY ....................................................................................................................................................... 23
6.1.
P
OWER
S
UPPLY
R
EQUIREMENTS
..................................................................................................................................... 23
6.2.
P
OWER
C
ONSUMPTION
................................................................................................................................................ 24
6.3.
G
ENERAL
D
ESIGN
R
ULES
............................................................................................................................................... 25
6.3.1.
Electrical Design Guidelines ........................................................................................................................... 25
6.3.2.
Thermal Design Guidelines ............................................................................................................................ 29
6.3.3.
Power Supply PCB layout Guidelines ............................................................................................................. 30
7.
ANTENNA ................................................................................................................................................................ 32
7.1.
GSM
A
NTENNA
R
EQUIREMENTS
.................................................................................................................................... 32
7.2.
GSM
A
NTENNA
-
PCB
LINE
G
UIDELINES
.......................................................................................................................... 33
7.3.
GSM
A
NTENNA
-
I
NSTALLATION
G
UIDELINES
................................................................................................................... 37
8.
LOGIC LEVEL SPECIFICATIONS .................................................................................................................................. 38
8.1.
R
ESET SIGNAL
............................................................................................................................................................. 39
9.
SERIAL PORTS .......................................................................................................................................................... 41
9.1.
MODEM
SERIAL
PORT ............................................................................................................................................. 41
9.2.
RS232
LEVEL TRANSLATION
.......................................................................................................................................... 43
9.3.
................................................................................................................................................................................ 46
9.4.
5V
UART
LEVEL TRANSLATION
...................................................................................................................................... 47
10.
AUDIO SECTION OVERVIEW ................................................................................................................................ 49