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Telit GE863-QUAD / GE863-PY
Hardware User guide
1vv0300697, Rev. ISSUE#0, - 21/11/05
Reproduction forbidden without Telit Communication written authorization – All Right reserved – Right of modification reserved
page 2 of 69
Contents
1
OVERVIEW
5
2
HARDWARE COMMANDS
6
2.1
Turning ON the GE863-QUAD
6
2.2
Turning OFF the GE863-QUAD
8
2.2.1
Hardware shutdown
8
2.3
Hardware Unconditional Reboot
8
3
POWER SUPPLY
10
3.1
Power Supply Requirements
10
3.2
General Design Rules
10
3.2.1
Electrical design Guidelines
11
3.2.1.1
+ 5V input Source Power Supply Design Guidelines
11
3.2.1.2
+ 12V input Source Power Supply Design Guidelines
12
3.2.1.3
Battery Source Power Supply Design Guidelines
13
3.2.1.4
Battery Charge control Circuitry Design Guidelines
13
3.2.2
Thermal Design Guidelines
15
3.2.3
Power Supply PCB layout Guidelines
16
4
ANTENNA
17
4.1
Antenna Requirements
17
4.2
Antenna PCB line Guidelines
18
4.3
Antenna installation Guidelines
19
5
SERIAL PORT
20
5.1
RS232 level translation
22
5.2
5V UART level translation
24
6
MICROPHONE
26
6.1
Microphone line Characteristic and requirements
26
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