Hardware Manual
Table Of Contents
- WE865-DUAL Hardware User Guide
- Contents
- 1 Overview
- 2 Mechanical description
- 3 Pin-out
- 4 Electrical description
- 5 Thermal design guidelines
- 6 PCB layout design guidelines
- 7 Antenna
- 8 Integration with the GE863-PRO3
- 9 WE865-DUAL - Evaluation kit
- 10 Mounting the WE865-DUAL on the application board
- 11 Moisture sensitivity
- 12 Conformity assessment issues
- 13 Safety recommendations
- 14 Document change log
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 13 of 48
4 Electrical description
The power supply circuitry and board layout are a very important part in the full product design and
they strongly reflect on the product overall performances, hence read carefully the requirements and
the guidelines that will follow for a proper design.
4.1 Power supply
Powering of the module:
• wide range voltage operation from 3.4V up to 4.2V (typical voltage 3.8V) the same as
for GE863-PRO
3
.
The above voltage range is chosen in order to use the same voltage range for the Wi-Fi module
WE865-DUAL and the GE863-PRO
3
.
4.1.1 Unique supply voltage for WE865-DUAL and GE863-PRO
3
In order to get the suitable voltage range valid for both WE865-DUAL and GE863-PRO
3
certain balls
need to be connected as described below.
signal ball 3.8V (typ)
F1 √
F2 √
VCC_A
F3 √
E1 √
VDD
E2 √
Table 3