SIM7090G EVB Kit User Guide V1.00
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3.5 Power Switch
Both USB interface (A) and UART Port interface (B) provide power supply for EVB. After plugging in either
USB cable, switch on SW201, then power indicator LED (LED201) will be keeps on.
3.6 PWRKEY Button
After power on EVB, press the PWRKEY button for more than 1.5 seconds and release, the module will be
powered up, and the STATUS LED (LED101) will be keeps on. The network LED (LED102) will blink.
Please note that the time to press the PWRKEY key cannot exceed 12s(please get more details from
Hardware Design Manual).
3.8 LED Indicator
The working behavior of the LED indicator is as following.
Name Description Status
LEDD201 Power ON/OFF indicator
Bright：EVB Power ON;
NET status indicator Blinking at a certain frequency according various net status
LED101 Module status indicator
Bright: Module runs normally
Extinct: System is powered down
NETLIGHT Pin Status Module Status
Searching Network/Call Connect
800ms ON, 800ms OFF Registered network
OFF Power off / Sleep
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