Product Info

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design
2-17
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2.3. Functional Diagram
The following figure shows a block diagram of EC21 and illustrates the major functional parts.

Power management

Baseband

DDR+NAND flash

Radio frequency

Peripheral interfaces
Figure 1: Functional Diagram
2.4. Evaluation Board
In order to help customers develop applications with EC21, Quectel supplies an evaluation board (EVB),
USB to RS-232 converter cable, earphone, antenna and other peripherals to control or test the module.