5G HUB BG96 Technical User's Manual - Page 15

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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

C are not supported

PSM_IND and AP_READY are not supported

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

board.

Connected to BG96. General purpose analogue to digital converter

Connected to BG96. General purpose IO

Used to insert a Nano USIM. Connected to BG96

Connected to BG96. Force the BG96 to enter emergency download

mode