Quectel EC21 Series User Manual

LTE Standard Module Series
EC21_Series_Hardware_Design
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2.3. Functional Diagram
The following figure shows a block diagram of EC21 series and illustrates the major functional parts.

Power management

Baseband

DDR+NAND flash

Radio frequency

Peripheral interfaces
Figure 1: Functional Diagram
Firmware Upgrade USB 2.0 interface or DFOTA
RoHS All hardware components are fully compliant with EU RoHS directive

Quectel EC21 Series Specifications

General

Brand	Quectel
Model	EC21 Series
Category	Control Unit
Language	English