XM8200S Designer’s Guide
XM8200S-E00-100
xmodus swiss GmbH
Seite 17 / 22
4
4
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P
P
O
O
W
W
E
E
R
R
S
S
U
U
P
P
P
P
L
L
Y
Y
The XM8200S power supply must be a single external DC voltage source of 3.3V or 5V
(depending on model). It is recommended that the user application or usage scenario avoid
power cuts, in particular during the initialization process of the unit after power on. Please
follow the Designers Guide in respect to the Power supply levels in order to operate the unit
within specifications.
Table 4-1: Power Supply Signals:
Pin Nr.
Signal name
Description
26, 41
GND
Main ground connection for module.
61
VCC
VIN = 3.3 V or 5 V
I
RMS
= 190 mA during receive
I
MAX
= 280 mA during transmit bursts
4.1 Power Loss shut down
A low power shut down occurs when the WLAN module senses the external power supply is
below the minimal operating limit. The module will respond by powering down automatically
without notice.
This form of power-down is not recommended for regular use since the unexpected power
loss may result in loss of data and unstable power-on sequences.
