Ebyte E30-900M20S, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co.,Ltd E30-900M20S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
7
16 MISO
Output SPI master output slave input
17 MOSI Input SPI master input slave output
18 SCK Input Serial Clock Input
19 nSEL Input SPI Chip select for starting SPI communication
20 GND Ground wire, connected to the power reference ground
21 ANT Input/Output Antena
22 GND Ground wire, connected to the power reference ground
4 Recommended circuit diagram
5 Hardware design

It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible and the
module needs to be reliably grounded;

Please pay attention to the correct connection of the positive and negative poles of the power supply, reverse connection
may cause permanent damage to the module;

Please check the power supply to ensure that between the recommended supply voltage, if exceeding the maximum, the
module will be permanently damaged;

Please check the stability of the power supply. Voltage can not fluctuate greatly and frequently;

When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the
margin, so the whole machine is beneficial for long-term stable operation;

The module should be as far away as possible from the power supply, transformers, high-frequency wiring and other
parts with large electromagnetic interference;

Bottom Layer High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under
the module. If it is necessary to pass through the module, assume that the module is soldered to the Top Layer, and