Sierra Wireless AirLink FX100, Руководство пользователя

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4112221 Rev 7.2 June 19, 2013 43
User Guide Interfaces
Parameter I/O Min Typ Max Unit
D-, D+ (High speed)
Input High 0.30 0.44 V
Input Low 0 0.01 V
Output High 0.36 0.38 0.44 V
Output Low 0 0.01 V
The USB feature can be activated by using the AT+WMFM=0,1,3 AT command. Refer to documents
[1] Open AT Application Framework AT Commands Interface Guide and [2] AirPrime SL808xT and
Q2698 Open AT Framework Commands Interface Guide for more information regarding this AT
command.
5.2. Back Interface
Figure 24. FX Series Back Interface
Note: * The secondary and GPS RF interfaces are only available for FX100.
5.2.1. SIM Interface
A SIM card can be directly connected to the FX Series through the embedded SIM socket. This
interface controls 3V / 1V8 SIM cards and it is fully compliant with GSM 11.11 recommendations
concerning SIM functions.
The SIM interface of the FX Series is ESD protected. Transient overvoltage protections in ESD are
internally added on the signals connected to the SIM interface in order to prevent any damage from
electrostatic discharge.
The SIM interface uses 5 SIM signals, namely:

SIM-VCC: SIM Power supply

~SIM-RST: Reset

SIM-CLK: Clock

SIM-IO: I/O Port

SIMPRES: SIM card detection
Secondary RF Interface*
SIM Interface
Main RF Interface
LED Status Indicator
X-card Compartment
GPS RF Interface*