Behaviors Of Ri; Usb_Boot Interface - Quectel BG77 Hardware Design

3.15. Behaviors of RI*

AT+QCFG="risignaltype","physical" command can be used to configure RI behavior.
No matter on which port URC is presented, URC will trigger the behavior of RI pin.
The default behaviors of RI are shown as below.
Table 20: Default Behaviors of RI
State Response
Idle RI keeps in high level.
URC RI outputs 120ms low pulse when new URC returns.
The default RI behaviors can be configured flexibly by AT+QCFG="urc/ri/ring" command. For more
details about AT+QCFG*, please refer to document [2].
NOTES
1. URC can be outputted from UART port, USB AT port and USB modem port, through configuration via
AT+QURCCFG command. The default port is USB AT port.
2. "*" means under development.

3.16. USB_BOOT Interface

BG77_Hardware_Design
Figure 21: Reference Circuit of STATUS
LPWA Module Series
BG77 Hardware Design
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