Smart Machine Smart Decision
SIM5320JE-TE_Hardware Design_V1.01
2012-07-10
42
Table 26: LED status
LED Status
Module Status
Always On
Searching Network/Call Connect
200ms ON, 200ms OFF
Data Transmit
800ms ON, 800ms OFF
Registered network
Off
Power off / Sleep
Flight mode control
GPIO4 controls SIM5320JE-TE module to enter or exit the Flight mode. In Flight mode, SIM5320JE-TE
closes RF function to prevent interference with other equipments or minimize current consumption.
Bidirectional ESD protection component is suggested to add on GPIO4.
Figure
31
: Flight mode switch
Table 27: Control status
GPIO4 Status
Module operation
Low Level
Flight Mode: RF is closed.
High Level
Normal Mode: RF is working.
Note
：
1. For SIM5320JE-TE, GPIO0, GPIO2, GPIO3 and GPIO5 have multiplex function, user can use them as PCM
interface to connect extend codec. Refer to section 3.10 and document [1] for details.
2. When the module is powered off, make sure all digital interfaces (PCM UART, etc) connected with peripheral devices
have no voltage higher than 0.3V. If users’ design cannot meet above conditions, high level voltages maybe occur in
GPIO pins because current leakage from above digital interfaces may occur.
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