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L816-AM Hardware User Manual
Page 32 of 42
3.6.4
PA_Blanking
While the module works in GSM frequency band, the PA_Blanking pin will output the pulse signals that
synchronize with the GSM burst TX timing. As the GSM TX may interfere the receiving of the GPS signal,
AP can disable GPS or stop receiving GPS data when it detects the PA_Blanking pulse signals, to avoid
GPS working abnormally.
Operating modes
PA_BLANKING signal
Default
Low level
GSM burst TX
Output the pulse signals that synchronize with the GSM burst TX.
PA_BLANKING timing is shown in Figure 3-15:
Figure 3-15 PA_Blanking Timing
3.7
Interrupt Control
The L816-AM module provides four interrupt signals, and the pin definition is as follows:
Pin Pin Name
I/O
Reset Value Pin Description
Type
31
Wakeup_Modem
I
PD
Reserved
CMOS 1.8V
40
W_Disable#
I
PD
Enable/Disable RF network
CMOS 1.8V
27
BodySar
I
PU
Body SAR detection
CMOS 1.8V
3.7.1 W_Disable#
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_Disable# signal is as follows:
W_Disable# signal
Function
High/Floating
WWAN enable, the module exits the Flight mode.
Low
WWAN disable, the module enters Flight mode.
