BG95 USB UserManual

14
USB Dongle Rev 1.0 Copyright © 5GHUB.US
PA6
IO
GPIO. Can be used as GPIO
Cortex Debug
Connector
IO
Using Single Wire Debug to burn bootloader and debug the
board
ADC0
I
Connected to BG95. General purpose analogue to digital converter
ADC1
I
Connected to BG95. General purpose analogue to digital converter
GPIO26
IO
Connected to BG95. General purpose IO
GPIO64
IO
Connected to BG95. General purpose IO
USIM
I
Used to insert a Nano USIM. Connected to BG95
USB Boot I
Connected to BG95. Force the BG95 to enter emergency download
mode
Precaution
The USB dongle runs at 3.3V. The maximum voltage that the I/O pins can tolerate is 3.3V.
Applying voltages higher than 3.3V to any I/O pin could damage the board
2.9 BG95 chipset
All functionality of the BG95shipset shall be implemented excluding the following features. That is, the
following features are not supported
[1][2].
- Audio, Earphone, and Codes are not supported.
- PCM and I
2
C are not supported
- PSM_IND and AP_READY are not supported
2.10 Interface between SAM21D and BG95
The Microcontroller communicates with the BG95 through UART interfaces:
- UART1: (PA12/PA13/PA14/PA15). Used for data transmission and AT command communication
115200bps by default. The default frame format is 8N1 (8 data bits, no parity, 1 stop bit) Support
RTS and CTS hardware flow control.
- UART3: (PB23/PB22). Used for outputting GNSS data or NEMA sentences 115200bps baud rate.