Ebyte E10-433MS, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co., Ltd. E10-433MS User Manual
Copyright ©2012–2021
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
7
affect the performance. It is recommended to keep them away from the module according to the strength of the
interference. If necessary, appropriate isolation and shielding can be done
；

Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog,
power traces) around the module that will greatly affect the performance of the module. It is recommended to stay
away from the module according to the strength of the interference.If necessary, appropriate isolation and shielding
can be done.

If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is
still a risk of damage)
；

Try to stay away from some physical layers such as TTL protocol at 2.4GHz , for example: USB3.0
；

The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure
that the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good
antenna extension cable to extend the antenna to the outside
；

The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly
weakened.
4.2 Software editing

GPIO0 \ GPIO1 \ GPIO2 \ GPIO3 are configurable I/O ports for various application
，
see more in SI4438
datasheet.It can be floated when not used.

IRQ pin can also be disconnected. The SPI query mode can be used to obtain the interrupt status. However, it is
recommended to use the external interrupt of the MCU.

SPI communication rate should not be set too high, usually around 1Mbps.

Please refer to “Operating Modes and Timing” for SI4438 status switch
，
the switch between TX and RX should be
through Ready, can not be switched directly.

Re-initialize register configuration when the chip is idle for higher stability.

For controlling GPIO2 ,GPIO3 externally
，
pin status is as follows
：
In tx mode
：
GPIO2 = 0; GPIO3 = 1;
In rx mode
：
GPIO2 = 1; GPIO3 = 0;
If the SI4438 is required to control itself, the mode of the configuration pins can be as follows when
the program is initialized:
SI44XX_GPIO_CONFIG( 0, 0, 32|0x40, 33|0x40, 0, 0, 0 );