WE865-DUAL HW User Guide
1vv0300787
Rev. 1 - 03/10/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 3 of 48
Contents
1
Overview ...........................................................................................................................6
1.1
Related documents ................................................................................................................7
2
Mechanical description....................................................................................................8
3
Pin-out.............................................................................................................................10
3.1
Pin table.................................................................................................................................10
3.2
Ball grid .................................................................................................................................12
4
Electrical description .....................................................................................................13
4.1
Power supply ........................................................................................................................13
4.1.1
Unique supply voltage for WE865-DUAL and GE863-PRO
3
......................................................... 13
4.1.1.1
Current consumption ................................................................................................................. 15
4.1.1.2
Shut-down mode........................................................................................................................ 15
4.2
Power supply design guidelines.........................................................................................16
4.2.1
+5V input source............................................................................................................................ 17
4.2.2
+12V input source.......................................................................................................................... 18
4.2.3
Battery source................................................................................................................................ 20
4.3
Reset signals ........................................................................................................................20
4.3.1
Reset.............................................................................................................................................. 21
4.3.2
Manual reset .................................................................................................................................. 22
4.4
SDIO signals .........................................................................................................................23
5
Thermal design guidelines ............................................................................................24
6
PCB layout design guidelines.......................................................................................25
7
Antenna...........................................................................................................................26
7.1
Wi-Fi antenna guidelines .....................................................................................................26
7.2
Wi-Fi antenna PCB trace guidelines ...................................................................................27
7.3
Wi-Fi antenna installation guidelines .................................................................................28
8
Integration with the GE863-PRO
3
..................................................................................29
8.1
Power supply ........................................................................................................................30
8.2
SDIO signals .........................................................................................................................31
9
WE865-DUAL - Evaluation kit........................................................................................32
9.1
WE865-DUAL Interface board..............................................................................................35
9.1.1
Mechanical description .................................................................................................................. 35
9.1.2
Main components .......................................................................................................................... 36
9.1.3
Jumpers settings............................................................................................................................ 38
