Ebyte E106-868G27P2, Руководство пользователя

Страница: 8 / 15

Chendu Ebyte Electronic Technology Co.,Ltd. E106-868G27P2 Usermanual
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.