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Cortex Debug
Connector
Modem ADC0
Modem ADC1
Modem GPIO0
Modem GPIO1
USIM
USB Boot
Precaution
The NB-IoT phone 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 I
2
C 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.
NB-IoT Phone 1.0
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
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