Chengdu Ebyte Electronic Technology Co., Ltd.
E19-915M20S User Manual
Copyright ©2012–2018
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
1-3
3.Size and pin definition
Pin No.
Name
Direction
Usage
1
GND
Input
Ground electrode, connected to the power reference ground.
2
DIO5
Input /Output
Configurable IO interface(See more details in SX1278 data sheet
3
DIO4
Input /Output
Configurable IO interface(See more details in SX1278 data sheet
4
DIO3
Input /Output
Configurable IO interface(See more details in SX1278 data sheet
5
DIO2
Input /Output
Configurable IO interface(See more details in SX1278 data sheet
6
DIO1
Input /Output
Configurable IO interface(See more details in SX1278 data sheet
7
DIO0
Input /Output
Configurable IO interface(See more details in SX1278 data sheet
8
RST
Input
Reset
9
NC
--
Not connect
10
GND
Input
Ground electrode, connected to the power reference ground.
11
VCC
Input
Power supply 1.8V-3.6V DC. 3.3V and external ceramic filter
capacitor are recommended.
）
12
SCK
Input
SPI clock
13
MISO
Output
Master input slave output
14
MOSI
Input
Master output slave input
15
NSS
Input
Chip select
16
TXEN
Input
Radio frequency switch control, make sure the TXEN pin is in
high level, RXEN pin is in low level when transmitting.
17
RXEN
Input
Radio frequency switch control, Make sure the RXEN pin is in
high level ,TXEN pin is in low level when receiving.
18
GND
Ground electrode, connected to the power reference ground.
19
GND
Ground electrode, connected to the power reference ground.
20
ANT
Output
Antenna
21
GND
Ground electrode, connected to the power reference ground.
