User's Manual

UC864-G Hardware User Guide
DRAFT
- 29/10/07
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 3 of 66
Contents
1 Overview ...........................................................................................................................7
2 Mechanical Dimensions...................................................................................................8
3 UC864-G module connections ........................................................................................9
3.1 PIN-OUT...................................................................................................................................9
3.1.1 UC864-G Antenna connector ............................................................................................................ 12
4 Hardware Commands ....................................................................................................13
4.1 Turning ON the UC864-G .....................................................................................................13
4.2 Turning OFF the UC864-G ...................................................................................................15
4.2.1 Hardware shutdown........................................................................................................................... 15
4.2.2 Hardware Unconditional Restart........................................................................................................ 15
5 Power Supply .................................................................................................................17
5.1 Power Supply Requirements...............................................................................................17
5.2 General Design Rules ..........................................................................................................18
5.2.1 Electrical Design Guidelines .............................................................................................................. 18
5.2.1.1 + 5V input Source Power Supply Design Guidelines ................................................................ 18
5.2.1.2 + 12V input Source Power Supply Design Guidelines .............................................................. 19
5.2.1.3 Battery Source Power Supply Design Guidelines ..................................................................... 21
5.2.1.4 Battery Charge control Circuitry Design Guidelines .................................................................. 21
5.2.2 Thermal Design Guidelines ............................................................................................................... 23
5.2.3 Power Supply PCB layout Guidelines ............................................................................................... 24
6 Antenna...........................................................................................................................25
6.1 GSM/WCDMA Antenna Requirements................................................................................25
6.2 GSM/WCDMA Antenna - Installation Guidelines ...............................................................26
6.3 GPS Antenna Requirements (TBD).....................................................................................26
6.4 GPS Antenna - Installation Guidelines ...............................................................................26
7 Logic level specifications..............................................................................................27
7.1 Reset signal ..........................................................................................................................28
8 Serial Ports .....................................................................................................................29
8.1 MODEM SERIAL PORT.........................................................................................................29
8.2 RS232 level translation ........................................................................................................31
8.3 5V UART level translation....................................................................................................33
9 USB Port .........................................................................................................................35
10 Audio Section Overview ................................................................................................36
10.1 Microphone Paths Characteristic and Requirements .......................................................37