5G Module Series
RG520N-AT_Hardware_Design 12 / 109
1 Introduction
This document defines RG520N-AT module and describes its air interfaces and hardware interfaces
which are connected with your applications.
It can help you quickly understand interface specifications, electrical and mechanical details, as well as
other related information of the module. The document, coupled with application notes and user guides,
makes it easy to design and set up mobile applications with the module.
1.1. Special Marks
Table 1: Special Marks
Unless otherwise specified, when an asterisk (*) is used after a function, feature, interface,
pin name, AT command, or argument, it indicates that the function, feature, interface, pin,
AT command, or argument is under development and currently not supported; and the
asterisk (*) after a model indicates that the sample of the model is currently unavailable.
Brackets ([…]) used after a pin enclosing a range of numbers indicate all pins of the same
type. For example, SDIO_DATA[0:3] refers to all four SDIO pins: SDIO_DATA0,
SDIO_DATA1, SDIO_DATA2, and SDIO_DATA3.
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