參數資料
型號: XBIB-U
廠商: Digi International/Maxstream
文件頁數: 9/72頁
文件大?。?/td> 1116K
描述: BOARD USB ZIGBEE MOD PRO
設計資源: XBIB-U Shematic
標準包裝: 1
附件類型: 接口板
適用于相關產品: XBee 和 XBee Pro 收音機
2007燤axStream,營nc.
牋牋?
2.燫F燤odule燨peration
2.1. Serial Communications
The XBee/XBee-PRO OEM RF Modules interface to a host device through a logic-level asynchro-
nous serial port. Through its serial port, the module can communicate with any logic and voltage
compatible UART; or through a level translator to any serial device (For example: Through a Max-
Stream proprietary RS-232 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?01.  System燚ata燜low燚iagram爄n燼燯ARTinterfaced爀nvironment 
(Lowasserted爏ignals燿istinguished爓ith爃orizontal爈ine爋ver爏ignal爊ame.)
Serial Data
Data enters the module UART through the DI pin (pin 3) as an asynchronous serial signal. The sig-
nal 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?02.  UART燿ata爌acket?x1F?decimal爊umber牶31?燼s爐ransmitted爐hrough爐he燫F爉odule 
Example燚ata燜ormat爄s?N1?bits?爌arity??爋f爏top燽its)
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).
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