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FM350-GL Hardware Guide Page 41 of 67
W_DISABLE1#
The module provides a hardware pin to enable/disable WWAN RF function, and the function can also be
controlled by the AT command. The module enters the flight mode after the RF function is disabled. The
definition of W_DISABLE1# signal is as below table:
WWAN function is enabled, the module exits the flight mode.
WWAN function is disabled, the module enters flight mode.
Note：
The function of W_DISABLE1# is disabled in default, it can be enabled by AT CMD:
AT+GTFMODE=1 and restart module.
BODYSAR
The FM350 module supports Body SAR function by detecting the DPR pin. The voltage level of DPR is
high by default, and when the SAR sensor detects the closing human body, the DPR signal will be pulled
down. As the result, the module then lowers down its emission power to its default threshold value, thus
reducing the RF radiation on the human body. The threshold of emission power can be set by the AT
Commands. The definition of DPR signal is shown in the following table:
The module keeps the default emission power
Lower the maximum emission power to the threshold value of the module.
3.8 ANT Tunable Interface
The module supports ANT Tunable interfaces with two different control modes, i.e. MIPI interface and 4bit
GPO interface. Through cooperating with external antenna adapter switch via ANT tunable, it can flexibly
configure the bands of LTE antenna to improve the antenna’s working efficiency and save space for the
antenna. Module also support 1.8V output for antenna tuner. The pin definition is as below table:
1.8V power output for antenna tuner, can mux as
GPIO.
Reserved
Tunable ANT control, MIPI Interface,
RFFE clock
Tunable ANT control, MIPI Interface,
RFFE data
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