Quectel EC21 Mini PCIe Series Hardware Design page 17

Audio Features
PCM Interface
USB Interface
Antenna Connectors
Rx-diversity (Optional)
GNSS Features
AT Commands
Physical Characteristics
Temperature Range
Firmware Upgrade
RoHS
NOTES
1)
1. Within operation temperature range, the module is 3GPP compliant.
2)
2. Within extended temperature range, the module remains the ability to establish and maintain a
voice, SMS, data transmission, emergency call*, etc. There is no unrecoverable malfunction. There
are also no effects on radio spectrum and no harm to radio network. Only one or more parameters
like P might reduce in their value and exceed the specified tolerances. When the temperature
out
returns to normal operation temperature levels, the module will meet 3GPP specifications again.
"*" means under development.
3.
EC21_Mini_PCIe_Hardware_Design
Support one digital audio interface: PCM interface
GSM: HR/FR/EFR/AMR/AMR-WB
WCDMA: AMR/AMR-WB
LTE: AMR/AMR-WB
Support echo cancellation and noise suppression
Support 16-bit linear data format
Support long frame synchronization and short frame synchronization
Support master and slave modes, but must be the master in long frame
synchronization
Compliant with USB 2.0 specification (slave only); the data transfer rate
can reach up to 480Mbps
Used for AT command communication, data transmission, firmware
upgrade, software debugging, GNSS NMEA output and voice over USB.
Support USB serial drivers for: Windows 7/8/8.1/10, Linux 2.6~5.4, Android
4.x/5.x/6.x/7.x/8.x/9.x, etc.
Include main antenna, diversity antenna and GNSS antenna receptacle
connectors
Support LTE/WCDMA Rx-diversity
Gen8C Lite of Qualcomm
Protocol: NMEA 0183
Data update rate: 1Hz by default
Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT
commands
Size: (51.0± 0.15)mm × (30.0± 0.15)mm × (4.9± 0.2)mm
Weight: approx. 9.8g
Operation temperature range: -35° C to +75° C
Extended temperature range: -40° C to +80° C
Storage temperature range: -40° C to +90° C
Upgrade via USB interface or DFOTA*
All hardware components are fully compliant with EU RoHS directive
LTE Standard Module Series
EC21 Mini PCIe Hardware Design
1)
2)
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