Quectel EC21-AU User Manual

LTE Standard Module Series
EC21_Series_Hardware_Design
23
/ 118
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-AU Specifications

General

Brand	Quectel
Model	EC21-AU
Category	Control Unit
Language	English