Product Info

LPWA Module Series
BG600L-M3 Hardware Design
BG600L-M3_Hardware_Design 49 / 83
The default MAIN_RI behaviors can be configured flexibly by AT+QCFG="urc/ri/ring" command. For
more details about AT+QCFG, please refer to document [2].
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.
2.16 USB_BOOT Interface
BG600L-M3 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 21: Pin Definition of USB_BOOT Interface
The following figure shows a reference circuit of USB_BOOT interface.
Figure 23: Reference Design of USB_BOOT Interface
URC MAIN_RI outputs 120 ms low pulse when a new URC returns.
Pin Name Pin No. I/O Description Comment
USB_BOOT 56 DI
Force the module into
emergency download
mode
1.8 V power domain.
Active high.
If unused, keep it open.
NOTE