5G HUB BG77 USB Manual - Página 11

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2.7 PIN Description

DIRECTION

USB Connector

LED (Power)

LED (NET)

LED (STAT)

3.3V

GND

SCL

SDA

Cortex Debug

Connector

ADC0

ADC1

GPIO0

GPIO1

SPI

USIM

3 LTE and GNSS modem

Before powering on the USB dongle, make sure to insert SIM card into the SIM card slot and connect GNSS

and LTE antennas to the antenna UFL connectors on the USB dongle.

Plug the USB dongle into a USB port on a PC. When the USB is plugged into the USB port, the power LED

turns on. There are other two LEDs (STATE and NET) on the USB dongle for the modem status as listed in

the table:

LED

PWR

STATE

NET

Flicker slowly (200ms High/1800ms Low)

Flicker slowly (1800ms High/200ms Low)

Flicker slowly (125ms High/125ms Low)

When the USB dongle is powered-on, it will enumerate BG77 modem interfaces in "Device manager" on

Windows OS as shown in Figure 7.

USB Dongle Rev 1.0

Table 2: PIN description

The USB dongle is powered from the USB port (3.8V-5V)

LED on powering on the USB

Indicate the BG77 operation status

Indicate the BG77 network activity status

3.3V generated by the on-board regulator. Maximum current

drawn is 3A. The regulator also provides power to the MCU and

BG77

5V generated from the board. The board is supplied with power

from USB connector (typical 5V)

Ground

C. The SCL (clock line). Can be used as GPIO

C. The SDA (data line). Can be used as GPIO

Using Single Wire Debug to burn bootloader and debug the

board

Connected to BG77. General purpose analogue to digital converter

Connected to BG77. General purpose IO

Connected to BG77.

Used to insert a Nano USIM. Connected to BG77

Table 3: Modem LEDs

Behavior

Description

Indicates the USB dongle is powered on

Indicates the BG77 is powered on

Network Searching

Idle

Data transfer is ongoing