Chengdu Ebyte Electronic Technology Co.,Ltd
E22-900M22S User manual
Copyright ©2012–2018
，Chengdu Ebyte Electronic Technology Co.,Ltd
4
Modulation method
LoRa(recommend)
Encapsulation way
SMD
Interface
1.27mm
Stamp hole
Communication interface
SPI
0-10Mbps
Modulation method
10* 10*2.5 mm
Antenna interface
Stamp hole/IPEX
The equivalent impedance is about 50 ohms
Chapter 3 machine dimensions and pin definition
Pin number
Pin name
Pin direction
Pin purposes
1
VCC
Power supply, range 1.8V~3.7V (external ceramic filter capacitor
is recommended)
2
GND
Ground wire, connected to the power reference ground
3
NRST
input
Chip reset triggers input pin, active low level
4
NC
5
NC
6
ANT
Radio frequency interface, stamp hole
7
GND
Ground wire, connected to the power reference ground
8
NC
9
TXEN
input
Rf switch transmitting control pin, connected to external
microcontroller IO or DIO2, high level effective
10
RXEN
input
Rf switch receiving control pin, connected to external
microcontroller IO, high level effective
11
BUSY
output
Used for status indication
