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參數(shù)資料
型號(hào)： XIB-E
廠商： Digi International/Maxstream
文件頁(yè)數(shù)： 42/64頁(yè)
文件大小： 1858K
描述： BOARD INTERFACE ETHERNET
標(biāo)準(zhǔn)包裝： 1
附件類型： 接口板
適用于相關(guān)產(chǎn)品： XStream 和 Xcite 收音機(jī)
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 for either a retransmission or new data for a specific period of time. Even if
the transmitting module has indicated that it has no more pending transmit data, it may have not
received the previous ACK, and so it may retransmit the packet (potentially with no delay after
the ACK slot). In this case, the receiving module will always detect the immediate retransmission,
which will hold off the communications channel and thereby reduce collisions. Receiving modules
acknowledge each retransmission they receive, but they only pass the first copy of a packet they
receive out the UART.
RB and RO parameters are not applied to subsequent packets. This means that once transmission
has begun, it will continue uninterrupted until the DI buffer is empty or the streaming limit (TT)
has been reached. As with the first packet, the payload of each subsequent packet includes up to
the maximum packet size (PK parameter). The transmitting module checks for more pending
data near the end of each packet.
The streaming limit (TT parameter) specifies the maximum number of bytes that the transmitting
module will send in one transmission event, which may consist of many packets and retries. If
the TT parameter is reached, the transmitting module will force a random delay of 1 to RN delay
slots (exactly 1 delay slot if RN is zero). Each packet is counted only once toward TT, no matter
how many times the packet is retransmitted.
Subsequent packets in acknowledged mode are similar to those in streaming mode, with the
addition of an acknowledgement between each packet, and the possibility of retransmissions.
Subsequent packets are sent without an RF initializer, as the receiving modules are already
synchronized to the transmitting module from the preceding packet(s) and they remain
synchronized for the duration of the transmission event. Each retransmission of a packet includes
an RF initializer.
Once the transmitting module has sent all pending data or has reached the TT limit, the
acknowledged transmission event is completed. The transmitting module will not transmit again
for exactly RN delay slots, if the local RN parameter is set to a nonzero value. The receiving
module will not transmit for a random number of delay slots between 0 and (RN-1), if the local
RN parameter is set to a nonzero value. These delays are intended to lessen congestion following
long bursts of packets from a single transmitting module, during which several receiving modules
may have themselves become ready to transmit.
 
 
 
After receiving and acknowledging a packet, the receiving module will move to the next
frequency and listen
相關(guān)PDF資料
PDF描述
XIB-R BOARD INTERFACE RS232/485
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XIB-R 功能描述:界面模塊 RS-232/485 interface 24XStream 9XCite RoHS:否 制造商:4D Systems 產(chǎn)品:Serial Converters 通道/端口數(shù)量: 數(shù)據(jù)速率: 接口類型:USB, UART 工作電源電壓:3.3 V, 5 V 最大工作溫度:
XIB-U 功能描述:界面模塊 USB interface board 24XStream 9XCite RoHS:否 制造商:4D Systems 產(chǎn)品:Serial Converters 通道/端口數(shù)量: 數(shù)據(jù)速率: 接口類型:USB, UART 工作電源電壓:3.3 V, 5 V 最大工作溫度:
XIC25040 制造商:XIC 功能描述:25040 24HR '6
XILINXPWR-079 功能描述:電源管理IC開(kāi)發(fā)工具 Pow Mgt Eval Mod for Xilinx FPGAs RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
XILINXPWR-080 功能描述:電源管理IC開(kāi)發(fā)工具 Pow Mgt Eval Mod for Xilinx FPGAs RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
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