13
of
17
2.1.3
PIN
Define
&
Input
Voltage
Model
RTL8188
USB
module
series
PIN#
Definition
1
3.3V
IN
(Default)
/
5V
IN
(Optional)
2
LED
3
High
Speed
USB
D
‐
signal
4
High
Speed
USB
D+
signal
5
Radio
On/Off
Hi=On
;
Low=Off
6
GND
PIN
1
PIN
6
PIN
1
PIN
6
3.3V
5V
Notice:
Please
decide
which
Input
voltage
of
default
3.3V
or
5V
you
will
implement
to
your
main
board
and
refer
to
model
definition
to
choose
the
suitable
model
type
you
want
on
Chapter
1.4
INPUT
VOLTAGE:
PIN
DEFINE: