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L816-AM Hardware User Manual
Page 33 of 42
3.7.2 BodySar
The L816-AM module supports the BodySar detection function. The voltage level is high by default for
BodySar, and when the SAR sensor detects the closing human body, the BodySar 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 for BodySar function is as follows:
BodySar 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
Other Interfaces
ANT Tunable, and RF_GPO.
Pin
Pin Name
I/O
Reset Value
Pin Description
Type
9
RFE_RFFE2_VIO
PO
PD
RF LOGIC SWITCH
1.8V
10
RFE_RFFE2_SCLK
O
PD
Reserved
1.8V
11
RFE_RFFE2_SDATA I/O
PD
Reserved
1.8V
Pin
Pin Name
I/O
Reset Value
Pin Description
Type
4
GPIO_RF1
O
PD
RF LOGIC SWITCH
2.3V
5
GPIO_RF2
O
PD
RF LOGIC SWITCH
2.3V
The RFFE port will be re-purposed to be GPO, with GPO1/GPO2, they can be used control external
DPDT, SPxT.
