User's Manual

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design Confidential / Released 15 / 94
Baud rate reach up to 3000000bps, 115200bps by default
Support RTS and CTS hardware flow control
Debug UART:
Used for Linux console, log output
115200bps baud rate
SGMII Interface Support 10/100/1000Mbps Ethernet connectivity
Wireless Connectivity
Interfaces
Support a low-power SDIO 3.0 interface for WLAN and UART/PCM
interface for Bluetooth*
Rx-diversity Support LTE/WCDMA Rx-diversity
GNSS Features
Gen8CLite of Qualcomm
Protocol: NMEA 0183
AT Commands
Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT
commands
Network Indication
Two pins including NET_MODE and NET_STATUS to indicate network
connectivity status
Antenna Interface
Including main antennainterface(ANT_MAIN), Rx-diversity antenna
interface (ANT_DIV) and GNSS antenna interface (ANT_GNSS)
Physical Characteristics
Size: (32.0±0.15)×(29.0±0.15)×(2.4±0.2)mm
Weight: approx. 4.9g
Temperature Range
Operation temperature range: -35°C ~ +75°C
1)
Extended temperature range: -40°C ~ +85°C
2)
Firmware Upgrade USB interfaceand DFOTA*
RoHS All hardware components are fully compliant with EU RoHS directive
1.
1)
Within operating 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
out
might reduce in their value and exceed the specified tolerances. When the temperature
returns to normal operating temperature levels, the module will meet 3GPP specificationsagain.
3. “*” means under development.
2.3. Functional Diagram
NOTES