User's Manual

Reproduction forbidden without Fibocom Wireless Inc. written authorization - All Rights Reserved
H380-GL Hardware User Manual Page
35
of
47
Figure 3-16 WOWWAN# Timing
3.6.3 TX_BLANKING
When the module is operating on GSM band, TX_BLANKING outputs pulse signal synchronized with
GSM burst TX timing.
Because GSM TX timing may interfere with GPS signal receiving, the AP switches off GPS or stops GPS
data receiving after detected TX_BLANKING pulse signal, so as to avoid abnormal GPS operation.
Operating Mode of
Module
TX_BLANKING Signal
Default state
Low level
GSM burst TX
Output pulse signal synchronized with GSM burst TX
TX_BLANKING timing is shown in Figure 3-17:
Figure 3-17 TX_BLANKING Timing
3.7 Interrupt Control
H380 module provides 3 interrupt signals, and the pins are defined as below:
Pin
Pin Name
I/O
Reset Value
Pin Description
Type
8
W_DISABLE1#
I
PU
Switch on or off RF network
CMOS 3.3V
25
DPR
I
PU
Body SAR detection
CMOS 1.8V
44
GNSS_IRQ
I
PU
MBIM/ACM interface system
switching
CMOS 1.8V