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L850-GL Hardware User Manual Page 39 of 54
3.7 Interrupt Control
The L850 module provides four interrupt signals, and the pin definition is as follows:
Pin Pin Name
I/O
Reset Value Pin Description
Type
8
W_DISABLE1#
I
PD
Enable/Disable RF network
CMOS 3.3V
25
DPR
I
PU
Body SAR detection
CMOS 1.8V
26
W_DISABLE2#
I
PU
GNSS Disable signal,
Reserved
CMOS 1.8V
44
GNSS_IRQ
I
PD
GNSS Interrupt Request,
Reserved
CMOS 1.8V
3.7.1 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 follows:
W_DISABLE1# signal Function
High/Floating
WWAN function is enabled, the module exits the Flight mode.
Low
WWAN function is disabled, the module enters Flight mode.
Note
：
The function of W_DISABLE1# can be customized, please refer to the software porting guide.
3.7.2 BODYSAR
The L850 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 as 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.