The N21 module is characterized by ultra-low power consumption, wide area coverage, simple peripheral circuits, and easy development by customers. It is suitable for IoT communication devices with low speed and low power consumption. The module is packaged in 22Pin LGA, and the external size is only 18 mm * 13.8 mm * 2.5 mm, and the structure can basically meet the space size requirements of most customers. 1.1 Product Overview N21 is an ultra-small package NB-IoT industrial-grade wireless communication module. N21 includes multiple versions and configurations, each version and supported frequency bands are shown in Table 1-1: 1.2 Design Block Diagram The N21 module is mainly composed of the following parts, each part works in coordination to complete the data communication function: 1) Baseband 2) Flash3 ) RF front-end device 4) External interface 2 Comply with the standard N21 module complies with the following standards: People's Republic of China "Administrative Measures for Network Access of Telecommunications Equipment" GB4943.1-2011 "Information Technology Equipment Safety Part 1: General Requirements" CNCA-O7C-031 : 2007 "Implementation Rules for Compulsory Certification of Telecommunications Equipment, Telecommunications Terminal Equipment" "Announcement of the Ministry of Industry and Information Technology of the People's Republic of China No. 27 in 2017"
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