HE920 Family Product Description
80404ST10112A Rev.2 2013-05-06
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3.14.
Audio Interface
The HE920-EU and HE920-NA family support for both analog and digital audio interfaces
2 differential analog audio for a headset
PCM interface for digital audio interface
3.15.
Serial ports
Two serial ports are available.
Full RS232-C, with baud rate up to 4 Mbps (high-speed UART)
Simplified serial port (RX/TX only) for debugging
3.16.
USB port
The USB2.0 High speed supports data speed up to 480Mbps.
3.17.
User Interface
The user interface is managed by AT commands according to ITU-T V.250, 3GPP 27.007 and
27.005 specifications. Please refer to the HE920 AT command User Guide for complete details.
3.18.
Features
3.18.1.
Speech Coding
The HE920-xxG and HE920-xxR family support the following voice codecs:
Adaptive Multi Rate for WCDMA
Half Rate, Full Rate, Enhanced Full Rate, Adaptive Multi Rate for GSM
3.18.2.
SMS
The HE920 family supports the following SMS types:
Mobile Terminated (MT) class 0 ~ 3 with signaling of new incoming SMS, SIM full,
SMS read
Mobile Originated class (MO) 0 ~ 3 with writing, saving in SIM and sending
3.18.3.
Real Time Clock and Alarm
The HE920 family supports the Real Time Clock and Alarm functions through AT commands.
An alarm output pin can be configured to indicate the alarm with a hardware line output.
Furthermore the output of the RTC power supply is provided to external so that a backup
capacitor can be added to increase the RTC autonomy.
