3 Application Interface
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The function of W_DISABLE1# is disabled in default. It can be enabled by
customer’s request.
3.7.2
DPR
The FM101 module supports BodySAR 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:
DPR Signal
Function
High/Floating
The module keeps the default emission power
Low
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 WCDMA and 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:
Pin Pin Name
I/O Reset Value Pin Description
Level
24
ANT_TUNER_1V8 PO PD
1.8V power output for antenna
tuner, reserved
1.8V
56
RFFE_SCLK
O PD
Tunable ANT control, MIPI Interface,
RFFE clock
1.8V
