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L811-EB Hardware User Manual Page 33 of 47
LPG signal timing is shown in the Figure 3-15:
Figure 3-15 LPG Signal Timing
3.7.3
WAKEUP_HOST
The WAKEUP_HOST signal is used to wake the Host (AP) when there are incoming calls, SMS or other
data requests. The definition of WAKEUP_HOST signal is as follows
：
Operating Mode
WAKEUP_HOST Signal
Ringing /SMS or data requests
Pull low 1s then Pull high(pulse signal)
Idle/Sleep
High level
WAKEUP_HOST timing is shown in Figure 3-16:
Figure 3-16 WAKEUP_HOST Timing
3.7.4
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
WAKEUP_HOST
1S
Idle/Sleep
Call/SMS/Data
Idle/Sleep
Status
