参数资料
型号: XT09-MI
厂商: Digi International/Maxstream
文件页数: 9/71页
文件大小: 0K
描述: MODULE RF 900MHZ 1W 115K W/MMCX
标准包装: 1
系列: XTend™
频率: 900MHz
数据传输率 - 最大: 125kbps
调制或协议: FHSS,FSK
功率 - 输出: 1W
灵敏度: -100dBm
电源电压: 2.8 V ~ 5.5 V
电流 - 接收: 80mA
数据接口: PCB,通孔
天线连接器: MMCX
工作温度: -40°C ~ 85°C
封装/外壳: 模块
包装: 散装
2. ? RF ? Module ? Operation
WARNING: When operating at 1 Watt power output, observe a minimum separation distance of 2' (0.6m) between
modules. Transmitting in close proximity of other modules can damage module front ends.
2.1. Serial Communications
The XTend OEM RF Modules interface to a host device through a TTL-level asynchronous serial
port. Through its serial port, the module can communicate with any UART voltage compatible
device or through a level translator to any serial device (For example: RS-232/485/422 or USB
interface board).
2.1.1. UART Data Flow
Devices that have a UART interface can connect directly to the pins of the RF module as shown in
the figure below.
Figure ? 2 ‐ 01. System ? Data ? Flow ? Diagram ? in ? a ? UART ‐ interfaced ? environment
(Low ‐ asserted ? signals ? distinguished ? with ? horizontal ? line ? over ? signal ? name.)
Serial Data
Data enters the module UART through the pin 5 as an asynchronous serial signal. The signal
should idle high when no data is being transmitted.
Each data byte consists of a start bit (low), 8 data bits (least significant bit first) and a stop bit
(high). The following figure illustrates the serial bit pattern of data passing through the module.
Figure ? 2 ‐ 02. UART ? data ? packet ? 0x1F ? (decimal ? number ?? 31 ? ) ? as ? transmitted ? through ? the ? RF ? module
Example ? Data ? Format ? is ? 8 ‐ N ‐ 1 ? (bits ?‐? parity ?‐? # ? of ? stop ? bits)
The module UART performs tasks, such as timing and parity checking, that are needed for data
communications. Serial communications depend on the two UARTs to be configured with compati-
ble settings (baud rate, parity, start bits, stop bits, data bits).
? ? 2007 ? MaxStream, ? Inc.
????? 9
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