Chengdu Ebyte Electronic Technology Co., Ltd.
E22-900M30S User manual
Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd.
4
No.
Name
Direction
Function
1
GND
-
Ground wire, connected to the power reference ground
2
GND
-
Ground wire, connected to the power reference ground
3
GND
-
Ground wire, connected to the power reference ground
4
GND
-
Ground wire, connected to the power reference ground
5
GND
-
Ground wire, connected to the power reference ground
6
RXEN
Input
RF switch receiving control pin, connected to external microcontroller IO,
valid in high level
7
TXEN
Input
RF switch transmitting control pin, connected to external microcontroller IO
or DIO2, valid in high level
8
DIO2
Input/Output
Configurable universal IO port (see SX1262 manual for details)
9
VCC
-
Power supply, 2.5~5.5V(It is recommended to add external ceramic filter
capacitor)
10
VCC
-
Power supply, 2.5~5.5V(It is recommended to add external ceramic filter
capacitor)
11
GND
-
Ground wire, connected to the power reference ground
12
GND
-
Ground wire, connected to the power reference ground
13
DIO1
Input/Output
Configurable universal IO port (see SX1262 manual for details)
14
BUSY
Output
For status indication (see SX1262 manual for details)
15
NRST
Input
Chip reset trigger input pin, valid in low level
16
MISO
Output
SPI data output pin
17
MOSI
Input
SPI data output pin
18
SCK
Input
SPI data output pin
19
NSS
Input
Module chip select pin for starting an SPI communication
20
GND
-
Ground wire, connected to the power reference ground
21
ANT
-
Antenna interface, stamp hole (50 ohm characteristic impedance)
22
GND
-
Ground wire, connected to the power reference ground
4.
Basic Operation
4.1
Hardware Design
l
It is recommended to use DC stabilized power supply to supply power to the module. The power supply ripple
coefficient is as small as possible, and the module needs to be reliably grounded.
l
Please pay attention to the correct connection of the positive and negative poles of the power supply. If the reverse
connection is connected, the module may be permanently damaged.
l
Please check the power supply to ensure that between the recommended supply voltage, if exceeding the maximum,
the module will be permanently damaged.
l
Please check the stability of the power supply, the voltage can not be significantly frequent.
l
When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the
margin, and the whole machine is beneficial for long-term stable operation.
