参数资料
型号: XIB-R
厂商: Digi International/Maxstream
文件页数: 11/36页
文件大小: 826K
描述: BOARD INTERFACE RS232/485
标准包装: 1
附件类型: 接口板
适用于相关产品: XStream 和 Xcite 收音机
其它名称: Q2231853
9XCite"燨EM燫F燤odule?燩roduct燤anual爒2.1燵2007.01.04]
2007燤axStream,營nc.
牋牋?1
2.2.3. Receive Mode
If a modem detects RF transmitted data while operating in Idle Mode, it transitions into Receive
Mode to start receiving packets. Once a packet is received, it goes through the receiving-end of a
CRC (cyclic redundancy check) to ensure that the data was transmitted without error. If the CRC
data bits on the incoming packet are invalid, the packet is discarded. If the CRC is valid, the packet
is placed the DO Buffer. This process is shown in the figure below:
Figure?06.  Receive燤ode燚ata燜low
The modem returns to Idle Mode after valid data is no longer detected or once an error is detected
in the received data. If serial data-to-transmit is stored in the DI buffer while the modem is giving
precedence to Receive Mode, the data will be transmitted after the modem finishes receiving data
and returns to Idle Mode.
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