User`s manual

AIR B-Smart BoosterPack – User’s Manual Page 16 of 33
Release Date 11/04/13
 LED Disconnect DIP Switch (S2)
These DIP switches are used to electrically isolate the LEDs from the A2541 GPIO
signals for applications that require low-power operation. Position 1 also controls power
to the USB-UART Vccio pin. The default state of all DIP switches is ON (closed).
Table 4 – LED DIP Switch Settings (S2)
Switch
Position
Signal Name
Description
S2
1
VDD
PWR Red LED & USB-UART Vccio connect/disconnect.
ON (closed): Red LED is ON when power is applied to
the BoosterPack.
Power is applied to the USB-UART
device’s Vccio pin.
OFF (open): Red LED is disabled and cannot be turned
on, regardless of the voltage level supplied
to the BoosterPack.
The USB-UART device I/O is powered
down. Note that a USB cable should not
be plugged into J6 while this switch is OFF
and the S3 switches are ON.
2
P0_6
A2541 Red LED connect/disconnect.
ON (closed): Red LED is enabled and may be turned on
by driving its control signal high.
OFF (open): Red LED is disabled and cannot be turned
on, regardless of the state of its control
signal.
3
P1_0
A2541 Green LED connect/disconnect.
ON (closed): Green LED is enabled and may be turned
on by driving its control signal high.
OFF (open): Green LED is disabled and cannot be
turned on, regardless of the state of its
control signal.
4
P2_0
A2541 Blue LED connect/disconnect.
ON (closed): Blue LED is enabled and may be turned on
by driving its control signal high.
OFF (open): Blue LED is disabled and cannot be turned
on, regardless of the state of its control
signal.