User Manual

11
USB Dongle Rev 1.0 Copyright © 5GHUB.US
2.7 PIN Description
PIN
DIRECTION
Description
USB Connector
I
The USB dongle is powered from the USB port (3.8V-5V)
LED1 (Power)
O
LED on powering on the USB
LED (NET)
O
Indicate the BG77 operation status
LED (STAT)
O
Indicate the BG77 network activity status
3.3V O
3.3V generated by the on-board regulator. Maximum current
drawn is 3A. The regulator also provides power to the MCU and
BG77
5V O
5V generated from the board. The board is supplied with power
from USB connector (typical 5V)
GND
Ground
SCL
IO
I
2
C. The SCL (clock line). Can be used as GPIO
SDA
IO
I
2
C. The SDA (data line). Can be used as GPIO
Cortex Debug
Connector
IO
Using Single Wire Debug to burn bootloader and debug the
board
ADC0
I
Connected to BG77. General purpose analogue to digital converter
ADC1
I
Connected to BG77. General purpose analogue to digital converter
GPIO0
IO
Connected to BG77. General purpose IO
GPIO1
IO
Connected to BG77. General purpose IO
SPI
IO
Connected to BG77.
USIM
I
Used to insert a Nano USIM. Connected to BG77
2.8 BG77 chipset
All functionality of the BG77 shipset shall be implemented excluding the following features. That is, the
following features are not supported Error! Reference source not found.Error! Reference source not
found..
- Audio, Earphone, and Codes are not supported.
- PCM and I
2
C are not supported
- PSM_IND and AP_READY are not supported