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
