HE920 Family Product Description
80404ST10112A Rev.2 2013-05-06
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
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Power off current (Typical)
30 uA
Standby current at GSM Idle state
< 1.3 mA @DRX=9 (GNSS OFF)
Standby current at WCDMA Idle state
< 1.0 mA @ DRX=512F (GNSS OFF)
For further information, please refer to the HE920 family Hardware User Guide.
3.10.
Logic level
Where not specifically stated, the most of interface circuits work at 1.8V CMOS logic levels.
To get more detailed information about the logic level specifications used for HE920 family,
please refer to the HE920 family Hardware User Guide.
3.11.
Input and Outputs
3.11.1.
General Purpose I/Os
12 pins of general purpose I/Os can be configured by AT command in three different ways as
input, output and alternative function.
The GPIO listed below can be configured as an alternative function as well.
TBD : Alarm output
3.11.2.
Indication of Network Service Availability (STAT_LED)
The STAT_LED indicates the network service availability and call connection status. This
function usually needs an external circuit for LED driving.
3.11.3.
Power on monitor (PWR_MON) / Auxiliary power output for
accessories (VAUX1)
The PWR_MON indicates the status of the module running properly.
A regulated 1.8 V, 100 mA (max) power output is provided for an external device.
3.11.4.
Power on/off control (ON_OFF)
External power on/off control input. Refer to the HE920 family Hardware User Guide for more
details of Power on timing.
3.12.
SIM Reader
The HE920 family supports R5 and R99 3GPP TS 31.114 – USIM 1.8V and 3V ONLY with an
external SIM socket. For 5V SIM operation, an external level translator needs to be added.
Refer to the HE920 family Hardware User Guide.
3.13.
Converters
The HE920 family has 1 DAC and 2 ADCs.