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AREFA
SCK
MISO
MOSI
SS
PA7
PA6
Cortex Debug
Connector
ADC0
ADC1
GPIO26
GPIO64
USIM
USB Boot
USB1
USB2
Precaution
The board 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 BG96 chipset
All functionality of the BG96 shipset 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 I2C are not supported
-
PSM_IND and AP_READY are not supported
2.10 Interface between SAM21D and BG96
The Microcontroller communicates with the BG96 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.
Board Rev 2.2
Input reference voltage for the analog inputs used for either he
I
ADC or the DAC
IO
SPI Interface. Can be used as GPIO
IO
SPI Interface. Can be used as GPIO
IO
SPI Interface. Can be used as GPIO
IO
SPI Interface. Can be used as GPIO
IO
GPIO. Can be used as GPIO
IO
GPIO. Can be used as GPIO
Using Single Wire Debug to burn bootloader and debug the
IO
board
I
Connected to BG96. General purpose analogue to digital converter
I
Connected to BG96. General purpose analogue to digital converter
IO
Connected to BG96. General purpose IO
IO
Connected to BG96. General purpose IO
I
Used to insert a Nano USIM. Connected to BG96
Connected to BG96. Force the BG96 to enter emergency download
I
mode
IO
Connected to MCU
IO
Connected to BG96
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