Quectel EC21 Series

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.
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Power management
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Baseband
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DDR+NAND flash
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Radio frequency
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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