LTE Standard Module Series
EC200T Series Hardware Design
EC200T_Series_Hardware_Design 55 / 90
The status pin cannot be used as indication of module shutdown status when VBAT is removed.
3.17. Behaviors of the MAIN_RI
AT+QCFG="risignaltype","physical" can be used to configure MAIN_RI behaviors.
No matter on which port a URC is presented, the URC will trigger the behaviors of MAIN_RI pin.
The URC can be outputted via UART port, USB AT port and USB modem port, which can be set by
AT+QURCCFG command. The default port is USB AT port.
In addition, MAIN_RI behavior can be configured flexibly. The default behavior of the MAIN_RI is shown
as below.
Table 24: Behaviors of the MAIN_RI
State Response
Idle MAIN_RI keeps at high level
URC MAIN_RI outputs 120ms low pulse when a new URC returns
The MAIN_RI behavior can be changed via AT+QCFG="urc/ri/ring". Please refer to document [2] for
details.
3.18. FORCE_USB_BOOT Interface
EC200T series provides a FORCE_USB_BOOT pin. You can pull up FORCE_USB_BOOT to 1.8 V
before VDD_EXT is powered up, and the module will enter emergency download mode when it is
powered on. In this mode, the module supports firmware upgrade over USB interface.
NOTE
NOTE
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