LTE Module Series
BG96 Hardware Design
BG96_Hardware_Design 43 / 78
3.15. USB_BOOT Interface
BG96 provides a USB_BOOT pin. During development or factory production, USB_BOOT can force the
module to boot from USB port for firmware upgrade.
Table 20: Pin Definition of USB_BOOT Interface
Pin Name
Pin No.
I/O
Description
Comment
USB_BOOT
75
DI
Force the module to enter into
emergency download mode
1.8V power domain.
Active high.
If unused, keep it open.
The following figure shows a reference circuit of USB_BOOT interface.
Module
USB_BOOT
VDD_EXT
10K
Test point
TVS
Close to test point
Figure 20: Reference Circuit of USB_BOOT Interface
It is recommended to reserve the above circuit design during application design.
3.16. ADC Interfaces*
The module provides two analog-to-digital converter (ADC) interfaces.
AT+QADC=0
command can be
used to read the voltage value on ADC0 pin.
AT+QADC=1
command can be used to read the voltage
value on ADC1 pin. For more details about these AT commands, please refer to
document [2]
.
NOTE
