
41110590
Rev 6.1
January 28, 2019
18
Product Technical Specification and
User Guide
Interfaces/Peripherals
2.1.1.
SIM Interface
The GL7x00 has two SIM interfaces – an external SIM and an Embedded SIM. Having an embedded
SIM option allows the GL7x00 to support Dual SIM Single Standby (DSSS) using
AT+KSIMSEL
. Refer
to documents [3] AirPrime HL7588 AT Commands Interface Guide and [4] AirPrime HL76xx AT
Commands Interface Guide for more information regarding this command.
2.1.1.1.
External SIM
The external SIM can be directly inserted in the modem through the SIM door and is the default
hardware configuration of the GL7x00.
This interface controls both 1.8V and 3V SIM/USIM cards and it is fully compliant with ETSI UICC
specification.
This interface is ESD protected. Transient Voltage Suppressor diodes are internally added on the
signals connected to the SIM interface to prevent any damage from electrostatic discharge.
The SIM uses five SIM signals, namely:
•
SIM-VCC, which is the SIM power supply
•
SIM-RST, which is reset
•
SIM-CLK, is clock
•
SIM-IO, as the I/O port
•
SIM-DET, for SIM detection
Refer to the following table for the electrical characteristics of the SIM interface.
Table 6.
SIM Interface Electrical Characteristics
Parameter
Minimum
Typical
Maximum
Notes
SIM Interface Voltage (V)
(VCC, CLK, IO, RST)
-
2.90
-
The appropriate output
voltage is auto-detected and
selected by software.
-
1.80
-
SIM-DET
-
1.80
-
High active
SIM-VCC Current (mA)
-
-
10
In sleep mode, maximum
output current = 3mA
SIM-VCC Line Regulation (mV/V)
-
-
50
At Iout_Max
SIM-VCC Power-up Setting Time
from power down (µs)
-
10
-
2.1.1.2.
Embedded SIM
The GL7x00 has the option to use an embedded SIM which could either be a Sierra Wireless SIM or
a customized SON8 SIM.
With an external SIM, the GL7x00 can support Dual SIM Single Standby (DSSS).