Chendu Ebyte Electronic Technology Co.,Ltd.
Copyright ©2012–2021, Chendu Ebyte Electronic Technology Co.,Ltd.
7
2.2.
Power interface
Table 4: Power interface definition
Item
Pin No
IO Attribute
Function description
GND
4,9,15,18,21,26,27,29,34,35,37,40,43,50
—
—
3.3V
2,24,39,41,52
PI
3.3V power input
E106-868G27P2 module uses 3.3V power supply. In TX mode, the maximum instantaneous peak current may reach
400mA. In order to prevent voltage drop, the switch power supply or LDO used shall be able to provide enough current,
and a tantalum capacitor or electrolytic capacitor with large capacitance value shall be added at the power supply port of
the module. If switching power supply is used to supply power to the module, the circuit wiring shall avoid the antenna
part as much as possible to prevent EMC interference.
Figure 2: DC-DC reference circuit
2.3. SPI interface
The SPI interface signal definition of E106-868G27P2 module is shown in the following table.
Table 5: SPI interface signal definition
Item
Pin No.
I/O attribute
Description
Voltage
SX_SCK
45
DI
SPI clock signal input
3.3V
SX_MISO
47
DO
SPI data output
3.3V
SX_MOSI
49
DI
SPI data input
3.3V
SX_CSN
51
DI
SPI chip select signal input
3.3V
The master SPI needs to support full duplex. Please refer to the data sheet of SX1302 for the specific timing.
Summary of Contents for E106-868G27P2
Page 1: ...E106 868G27P2 Usermanual...
