User's Manual

Smart Machine Smart Decision
SIM7600NA-H_user manual _V1.00 46 2020-1-7
3.14 Flight Mode Control
The FLIGHTMODE pin can be used to control MODULE to enter or exit the Flight mode. In
Flight mode, the RF circuit is closed to prevent interference with other equipments and minimize
current consumption. Bidirectional ESD protection component is suggested to add on
FLIGHTMODE pin, its reference circuit is shown in the following figure.
Figure 33: Flight mode switch reference circuit
Table 20: FLIGHTMODE pin status
FLIGHTMODE pin status Module operation
Input Low Level Flight Mode: RF is closed
Input High Level
AT+CFUN=0: RF is closed
AT+CFUN=1:RF is working
3.15 Other interface
3.15.1 Sink Current Source
The ISINK pin is VBAT tolerant and intended to drive some passive devices, such as LCD
backlight and white LED, etc. Its output current can be up to 40mA and be set by the AT command
“AT+ CLEDITST”.
Table 21: Sink current electronic characteristic
Symbol Description Min. Typ. Max. Unit
V
ISINK
Voltage tolerant 0.5 - VBAT V
I
ISINK
Current tolerant 0 - 40 mA