参数资料
型号: MRF89XAT-I/MQ
厂商: Microchip Technology
文件页数: 82/140页
文件大小: 0K
描述: RF ISM BAND TXRX 32 QFN
标准包装: 1
频率: 863MHz ~ 870MHz,902MHz ~ 928MHz,950MHz ~ 960MHz
数据传输率 - 最大: 200kbps
调制或协议: FSK,OOK
应用: ISM
功率 - 输出: 12.5dBm
灵敏度: -113dBm
电源电压: 2.1 V ~ 3.6 V
电流 - 接收: 3mA
电流 - 传输: 25mA
数据接口: PCB,表面贴装
存储容量: *
天线连接器: PCB,表面贴装
工作温度: -40°C ~ 85°C
封装/外壳: 32-WFQFN 裸露焊盘
包装: 标准包装
其它名称: MRF89XAT-I/MQDKR
MRF89XA
3.11.0.1
Packet Format
The length of the payload is set by the PLDPLEN<6:0>
Two packet formats are supported: Fixed length and
Variable length, which are selected by the PKTLENF bit
(PKTCREG<7>). The maximum size of the payload is
limited by the size of the FIFO selected (16, 32, 48 or
64 bytes).
bits (PLOADREG<6:0) and is limited by the size of the
FIFO selected. The length stored in this register relates
only to the payload, which includes the message and
the optional address byte. In this mode, the payload
must contain at least one byte (that is, address or
message).
3.11.0.2
Fixed Length Packet Format
A fixed length packet frame format is illustrated in
In applications where the packet length is fixed in
Figure 3-26 , which contains the following fields:
advance, this mode of operation may be useful to min-
imize RF overhead (no length byte field is required). All
nodes, whether TX only, RX only, or TX/RX will be
programmed with the same packet length value.
?
?
?
?
?
Preamble (1010...)
Sync word (Network ID)
Optional Address byte (Node ID)
Message data
Optional 2-bytes CRC checksum
FIGURE 3-26:
FIXED LENGTH PACKET FORMAT
Optional DC free data coding
CRC checksum calculation
Preamble
1 to 4 bytes
Sync Word
1 to 4 bytes
Address
byte
Message
0 to (FIFO size) bytes
CRC
2-bytes
Payload/FIFO
Fields added by the packet handler in TX and processed and removed in RX
Optional, user provided field which are part of the payload
Message part of the payload
DS70622C-page 82
Preliminary
? 2010–2011 Microchip Technology Inc.
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