User's Manual

LTE Module Series
BG96-NA Hardware Design
BG96-NA_Hardware_Design Confidential / Released 41 / 64
The default behaviors of RI are shown as below.
Table 18: Default Behavior of RI
State
Response
Idle
RI keeps at high level.
URC
RI outputs 120ms low pulse when new URC returns.
The RI behavior can be changed by AT+QCFG=“urc/ri/ring” command. Please refer to document [2]
for details.
3.16. USB_BOOT Interface
BG96-NA provides a USB_BOOT pin. During development or factory production, USB_BOOT pin can
force the module to boot from USB port for firmware upgrade.
Table 19: Pin Definition of USB_BOOT Interface
Pin Name
Pin No.
I/O
Description
Comment
USB_BOOT
75
DI
Force the module to boot from USB
port
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 22: Reference Circuit of USB_BOOT Interface