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2.8 PIN Description
PIN
DIRECTION
DC Power Jack
LED (PWR)
LED1 (USER)
LED2 (USER)
LED (NET)
LED (STAT)
MCU RESET
button
BG96 RESET
button
User Button
IOREF
3.3V
5V
GND
VIN
A0
A1
A2
A3
A4
A5
SCL
SDA
Board Rev 2.2
The board can be supplied with power either from the DC power
I
jack (3.8V-5V), the USB connector (5V), or the VIN pin of the
board (3.8V-5V)
LED is lighted on when the board is power on from the MCU USB
O
port
LED which can be controlled from MCU (D25). When the pin is
O
HIGH value, the LED is on, when the pin is LOW, it is off
LED which can be controlled from MCU (D26). When the pin is
O
HIGH value, the LED is on, when the pin is LOW, it is off
O
Indicate the BG96 operation status
O
Indicate the BG96 network activity status
I
Reset the MCU
I
Reset the BG96 module
Connected to digital pin, D0, of MCU and can be used for user-
I
defined purposes
Provides the voltage reference with which the MCU operates. A
device can read the IOREF pin voltage and select the appropriate
O
power source or enable voltage translators on the outputs for
working with the 5V or 3.3V
3.3V generated by the on-board regulator. Maximum current
O
drawn is 300 mA. The regulator also provides power to the MCU
and BG96
5V generated from the board. The board can be supplied with
power either from the DC power jack (3.3V - 5V), the USB
connector (5V), or the VIN pin of the board (3.3-5V). Supplying
O
voltage via the 5V or 3.3V pins bypasses the regulator and can
damage the board if it is not sufficiently regulated (This is not
recommended)
Ground
Input voltage to the board when it uses an external power source (as
opposed to 5 volts from the USB connection or other regulated power
I
source). You can supply voltage through this pin, or if supplying
voltage via the power jack, access it through this pin
IO
Six analog inputs which can provide up to 12 bits of resolution
(i.e. 4096 different values). By default, each input measures
IO
from ground to 3.3 volts, though is it possible to change the
IO
upper end of their range using the AREF pin
IO
A0 can also be used as a DAC output and provides a 10 bit
IO
voltage output with
IO
Analog pins can be used as GPIOs
IO
I2C. The SCL (clock line). Can be used as GPIO
IO
I2C. The SDA (data line). Can be used as GPIO
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Description
analogWrite()
function
13
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