无线收发模块
RFM300模块系列基于CMOSTEK NextGenRFTM CMT2300芯片设计而成,可工作在433/868/915MHz,接收灵敏度(120dBm), +20dBm (RFM300H)/+13dBm(RFM300)发射功率,频率广链接性能高。
RFM300收发模块基本特征:
● 链路预算:140dB
● 接收电流低:7mA
● 发射功率: +20 dBm
● 可编程位速率达 300 kbps@FSK/40 kbps@OOK
● 高灵敏度: -120dBm
● 调制模式:FSK、GFSK、OOK
● SMD包装 (16x16X1.8mm)
RFM300收发模块的应用:
自动抄表,无线数据收集,汽车防盗报警系统,家居自动化与安防系统
Number
|
Definition
|
Type
|
Function
|
1
|
ANT
|
AI/ AO
|
RF signal input/output.
|
2
|
GND
|
G
|
Ground.
|
3
|
TX-ANT
|
I/O
|
Tx Antenna select input pin, When RFM300H is TX state,TX_ANT should be = 0, RX_ANT should be = 1
|
4
|
RX-ANT
|
I/O
|
Rx Antenna select input pin, When RFM300H is RX state,RX_ANT should be = 0, TX_ANT should be = 1
|
5
|
3.3V(VDD)
|
PI
|
Power supply input,1.8-3.6V.
|
6
|
GPIO1
|
I/O
|
General Purpose Digital I/O that may be configured through the registers to perform variousfunctions
|
7
|
GPIO2
| ||
8
|
GPIO3
| ||
9
|
GND
|
G
|
Ground.
|
10
|
SDIO
|
I/O
|
SPI Data input and output.
|
11
|
CSB
|
I
|
SPI Chip select input, active low.
|
12
|
SCK
|
I
|
SPI Clock input.
|
13
|
FCSB
|
I
|
SPI FIFO select input, active low.
|
14
|
NC
|
|
No Connect.
|
15
|
NC
|
|
No Connect.
|
16
|
GND
|
G
|
Ground.
|