User's Manual

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L850-GL Hardware User Manual Page
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Note
The function of W_DISABLE1# can be customized, please refer to the software porting guide.
3.8.2 BODYSAR
The L850 module supportsBody SARfunction 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 theRF radiation onthe human body. The threshold of emission power can be set by the AT
Commands. The definition ofDPR signalas 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.
3.9 ClockInterface
The L850 module supports a clock interface, itcan output 26MHz clock.
Pin
Pin Name
I/O
Reset Value
Pin Description
Type
46
SYSCLK
O
26M clock output, default disabled
can be used for externalGPS, etc
1.8V
3.10ANT Tunable Interface
The module supports ANT Tunable interfaces with two different control modes, i.e. MIPI interface and 3bit
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.
Pin
Pin Name
I/O
Reset Value
Pin Description
Type
56
RFE_RFFE2_
SCLK
O
Tunable ANT control,MIPI Interface,
RFFE2 clock,Open Drain output
CMOS
3.3/1.8V
58
RFE_RFFE2_
SDATA
O
Tunable ANT control,MIPI Interface,
RFFE2 data,Open Drain output
CMOS
3.3/1.8V
59
ANTCTL0
O
Tunable ANT control,GPO interface,
CMOS 1.8V